The information in this preliminary pricing supplement is not complete and may be changed.  This preliminary pricing supplement and the accompanying prospectus, prospectus supplement, and index supplement do not constitute an offer to sell these securities,and we are not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

Subject to Completion

Preliminary Pricing Supplement dated September 1, 2017

Preliminary Pricing Supplement (To the Prospectus dated July 18, 2016, the Prospectus Supplement dated July 18, 2016  and the Index Supplement dated July 18, 2016)		Filed Pursuant to Rule 424(b)(2) Registration No. 333-212571
	$[·] Buffered Notes due September 29, 2022 Linked to the Performance of the Russell 2000® Index Global Medium-Term Notes, Series A

Terms used in this preliminary pricing supplement, but not defined herein, shall have the meanings ascribed to them in the prospectus supplement.

Issuer:	Barclays Bank PLC
Denominations:	Minimum denomination of $1,000, and integral multiples of $1,000 in excess thereof
Initial Valuation Date:	September 26, 2017
Issue Date:	September 29, 2017
Final Valuation Date:*	September 26, 2022
Maturity Date:*	September 29, 2022
Reference Asset:	The Russell 2000® Index (Bloomberg ticker symbol “RTY <Index>”) (the “Index”)
Coupon Payments:	$10.125 per $1,000 principal amount Note, which is 1.0125% of the principal amount per Note (4.05% per annum), payable on each Coupon Payment Date
Coupon Payment Dates:**	The 29th of each March, June, September and December during the term of the Notes, beginning in December 2017 and ending on and including the Maturity Date
Buffer Percentage:	15.00%
Initial Level:	[·], the Closing Level of the Index on the Initial Valuation Date
Final Level:	The Closing Level of the Index on the Final Valuation Date
Index Return:	The performance of the Index from the Initial Level to the Final Level, calculated as follows: Final Level – Initial Level Initial Level
Payment at Maturity:	If you hold your Notes to maturity, you will receive on the Maturity Date (in each case, in addition to the final Coupon Payment) a cash payment per $1,000 principal amount Note that you hold determined as follows: §If the Index Return is equal to or greater than -15.00%, you will receive a payment of $1,000 per $1,000 principal amount Note §If the Index Return is less than -15.00%, you will receive a payment per $1,000 principal amount Note calculated as follows: $1,000 + [$1,000 x (Index Return + Buffer Percentage)] If the Index Return is less than -15.00%, you will lose 1.00% of the principal amount of your Notes for every 1.00% that the Index Return falls below -15.00%. You may lose up to 85.00% of the principal amount of your Notes (not including the Coupon Payments on the Notes). Any payment on the Notes, including the Coupon Payments and any payment at maturity, is not guaranteed by any third party and is subject to both the creditworthiness of the Issuer and to the exercise of any U.K. Bail-in Power by the relevant U.K. resolution authority. If Barclays Bank PLC were to default on its payment obligations or become subject to the exercise of any U.K. Bail-in Power (or any other resolution measure) by the relevant U.K. resolution authority, you might not receive any amounts owed to you under the Notes. See “Consent to U.K. Bail-in Power” and “Selected Risk Considerations” in this preliminary pricing supplement and “Risk Factors” in the accompanying prospectus supplement for more information.
Consent to U.K. Bail-in Power:	Notwithstanding any other agreements, arrangements or understandings between Barclays Bank PLC and any holder of the Notes, by acquiring the Notes, each holder of the Notes acknowledges, accepts, agrees to be bound by, and consents to the exercise of, any U.K. Bail-in Power by the relevant U.K. resolution authority. See “Consent to U.K. Bail-in Power” on page PPS-1 of this preliminary pricing supplement.

[Terms of the Notes Continue on the Next Page]

	Initial Issue Price(1)(2)	Price to Public	Agent’s Commission(3)	Proceeds to Barclays Bank PLC
Per Note	$1,000	100%	3.25%	96.75%
Total	$[·]	$[·]	$[·]	$[·]

(1)Because dealers who purchase the Notes for sale to certain fee-based advisory accounts may forego some or all selling concessions, fees or commissions, the public offering price for investors purchasing the Notes in such fee-based advisory accounts may be between $967.50 and $1,000 per Note. Investors that hold their Notes in fee-based advisory or trust accounts may be charged fees by the investment advisor or manager of such account based on the amount of assets held in those accounts, including the Notes.

(2)Our estimated value of the Notes on the Initial Valuation Date, based on our internal pricing models, is expected to be between $925.00 and $958.50 per Note.  The estimated value is expected to be less than the initial issue price of the Notes.  See “Additional Information Regarding Our Estimated Value of the Notes” on page PPS-2 of this preliminary pricing supplement.

(3)Barclays Capital Inc. will receive commissions from the Issuer of up to 3.25% of the principal amount of the Notes, or up to $32.50 per $1,000 principal amount. Barclays Capital Inc. will use these commissions to pay variable selling concessions or fees (including custodial or clearing fees) to other dealers. The actual commission received by Barclays Capital Inc. will be equal to the selling concession paid to such dealers.

Investing in the Notes involves a number of risks.  See “Risk Factors” beginning on page S-7 of the prospectus supplement and “Selected Risk Considerations” beginning on page PPS-5 of this preliminary pricing supplement.

The Notes will not be listed on any U.S. securities exchange or quotation system.  Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined that this preliminary pricing supplement is truthful or complete. Any representation to the contrary is a criminal offense.

The Notes constitute our direct, unconditional, unsecured and unsubordinated obligations and are not deposit liabilities of either Barclays PLC or Barclays Bank PLC and are not covered by the U.K. Financial Services Compensation Scheme or insured or guaranteed by the U.S. Federal Deposit Insurance Corporation or any other governmental agency of the United States, the United Kingdom or any other jurisdiction.

Terms of Notes, Continued

Closing Level:	With respect to the Index, on any date, the official closing level of the Index published at the regular weekday close of trading on that date as displayed on Bloomberg Professional® service page “RTY <Index>” or any successor page on Bloomberg Professional® service or any successor service, as applicable, rounded to two decimal places
Tax Allocation of the Coupon Payments:	Deposit Income: [·]% of the amount of each Coupon Payment Put Premium: [·]% of the amount of each Coupon Payment
Calculation Agent:	Barclays Bank PLC
CUSIP/ISIN:	06744C2D2 / US06744C2D23

*Subject to postponement in the event of a Market Disruption Event, as described under “Additional Terms of the Notes” in this preliminary pricing supplement

**If such day is not a business day, the relevant Coupon Payment will be paid on the next following business day with the same force and effect. No interest will accrue as a result of any delayed payment.

ADDITIONAL DOCUMENTS RELATED TO THE OFFERING OF THE NOTES

You should read this preliminary pricing supplement together with the prospectus dated July 18, 2016, as supplemented by the prospectus supplement dated July 18, 2016 and the index supplement dated July 18, 2016 relating to our Global Medium-Term Notes, Series A, of which these Notes are a part.  This preliminary pricing supplement, together with the documents listed below, contains the terms of the Notes and supersedes all prior or contemporaneous oral statements as well as any other written materials including preliminary or indicative pricing terms, correspondence, trade ideas, structures for implementation, sample structures, brochures or other educational materials of ours.  You should carefully consider, among other things, the matters set forth under “Risk Factors” in the prospectus supplement and “Selected Risk Considerations” in this preliminary pricing supplement, as the Notes involve risks not associated with conventional debt securities.  We urge you to consult your investment, legal, tax, accounting and other advisors before you invest in the Notes.

You may access these documents on the SEC website at www.sec.gov as follows (or if such address has changed, by reviewing our filings for the relevant date on the SEC website):

·Prospectus dated July 18, 2016:

https://www.sec.gov/Archives/edgar/data/312070/000119312516650074/d219304df3asr.htm

·Prospectus Supplement dated July 18, 2016:

https://www.sec.gov/Archives/edgar/data/312070/000110465916132999/a16-14463_21424b3.htm

·Index Supplement dated July 18, 2016:

https://www.sec.gov/Archives/edgar/data/312070/000110465916133002/a16-14463_22424b3.htm

Our SEC file number is 1-10257.  As used in this preliminary pricing supplement, the “Company,” “we,” “us,” or “our” refers to Barclays Bank PLC.

CONSENT TO U.K. BAIL-IN POWER

Notwithstanding any other agreements, arrangements or understandings between us and any holder of the Notes, by acquiring the Notes, each holder of the Notes acknowledges, accepts, agrees to be bound by, and consents to the exercise of, any U.K. Bail-in Power by the relevant U.K. resolution authority.

Under the U.K. Banking Act 2009, as amended, the relevant U.K. resolution authority may exercise a U.K. Bail-in Power in circumstances in which the relevant U.K. resolution authority is satisfied that the resolution conditions are met. These conditions include that a U.K. bank or investment firm is failing or is likely to fail to satisfy the Financial Services and Markets Act 2000 (the “FSMA”) threshold conditions for authorization to carry on certain regulated activities (within the meaning of section 55B FSMA) or, in the case of a U.K. banking group company that is a European Economic Area (“EEA”) or third country institution or investment firm, that the relevant EEA or third country relevant authority is satisfied that the resolution conditions are met in the respect of that entity.

The U.K. Bail-in Power includes any write-down, conversion, transfer, modification and/or suspension power, which allows for (i) the reduction or cancellation of all, or a portion, of the principal amount of, interest on, or any other amounts payable on, the Notes; (ii) the conversion of all, or a portion, of the principal amount of, interest on, or any other amounts payable on, the Notes into shares or other securities or other obligations of Barclays Bank PLC or another person (and the issue to, or conferral on, the holder of the Notes such shares, securities or obligations); and/or (iii) the amendment or alteration of the maturity of the Notes, or amendment of the amount of interest or any other amounts due on the Notes, or the dates on which interest or any other amounts become payable, including by suspending payment for a temporary period; which U.K. Bail-in Power may be exercised by means of a variation of the terms of the Notes solely to give effect to the exercise by the relevant U.K. resolution authority of such U.K. Bail-in Power. Each holder of the Notes further acknowledges and agrees that the rights of the holders of the Notes are subject to, and will be varied, if necessary, solely to give effect to, the exercise of any U.K. Bail-in Power by the relevant U.K. resolution authority. For the avoidance of doubt, this consent and acknowledgment is not a waiver of any rights holders of the securities may have at law if and to the extent that any U.K. Bail-in Power is exercised by the relevant U.K. resolution authority in breach of laws applicable in England.

For more information, please see “Selected Risk Considerations—You May Lose Some or All of Your Investment If Any U.K. Bail-in Power Is Exercised by the Relevant U.K. Resolution Authority” in this preliminary pricing supplement as well as “U.K. Bail-in Power,” “Risk Factors—Risks Relating to the Securities Generally—Regulatory action in the event a bank or investment firm in the Group is failing or likely to fail could materially adversely affect the value of the securities” and “Risk Factors—Risks Relating to the Securities Generally—Under the terms of the securities, you have agreed to be bound by the exercise of any U.K. Bail-in Power by the relevant U.K. resolution authority” in the accompanying prospectus supplement.

PPS-1

ADDITIONAL INFORMATION REGARDING OUR ESTIMATED VALUE OF THE NOTES

The final terms for the Notes will be determined on the date the Notes are initially priced for sale to the public, which we refer to as the Initial Valuation Date, based on prevailing market conditions on or prior to the Initial Valuation Date, and will be communicated to investors either orally or in a final pricing supplement.

Our internal pricing models take into account a number of variables and are based on a number of subjective assumptions, which may or may not materialize, typically including volatility, interest rates, and our internal funding rates.  Our internal funding rates (which are our internally published borrowing rates based on variables such as market benchmarks, our appetite for borrowing, and our existing obligations coming to maturity) may vary from the levels at which our benchmark debt securities trade in the secondary market.  Our estimated value on the Initial Valuation Date is based on our internal funding rates.  Our estimated value of the Notes might be lower if such valuation were based on the levels at which our benchmark debt securities trade in the secondary market.

Our estimated value of the Notes on the Initial Valuation Date is expected to be less than the initial issue price of the Notes.  The difference between the initial issue price of the Notes and our estimated value of the Notes is expected to result from several factors, including any sales commissions expected to be paid to Barclays Capital Inc. or another affiliate of ours, any selling concessions, discounts, commissions or fees expected to be allowed or paid to non-affiliated intermediaries, the estimated profit that we or any of our affiliates expect to earn in connection with structuring the Notes, the estimated cost which we may incur in hedging our obligations under the Notes, and estimated development and other costs which we may incur in connection with the Notes.

Our estimated value on the Initial Valuation Date is not a prediction of the price at which the Notes may trade in the secondary market, nor will it be the price at which Barclays Capital Inc. may buy or sell the Notes in the secondary market. Subject to normal market and funding conditions, Barclays Capital Inc. or another affiliate of ours intends to offer to purchase the Notes in the secondary market but it is not obligated to do so.

Assuming that all relevant factors remain constant after the Initial Valuation Date, the price at which Barclays Capital Inc. may initially buy or sell the Notes in the secondary market, if any, and the value that we may initially use for customer account statements, if we provide any customer account statements at all, may exceed our estimated value on the Initial Valuation Date for a temporary period expected to be approximately six months after the Issue Date because, in our discretion, we may elect to effectively reimburse to investors a portion of the estimated cost of hedging our obligations under the Notes and other costs in connection with the Notes which we will no longer expect to incur over the term of the Notes.  We made such discretionary election and determined this temporary reimbursement period on the basis of a number of factors, which may include the tenor of the Notes and/or any agreement we may have with the distributors of the Notes.  The amount of our estimated costs which we effectively reimburse to investors in this way may not be allocated ratably throughout the reimbursement period, and we may discontinue such reimbursement at any time or revise the duration of the reimbursement period after the initial issue date of the Notes based on changes in market conditions and other factors that cannot be predicted.

We urge you to read the “Selected Risk Considerations” beginning on page PPS-5 of this preliminary pricing supplement.

You may revoke your offer to purchase the Notes at any time prior to the Initial Valuation Date.  We reserve the right to change the terms of, or reject any offer to purchase, the Notes prior to the Initial Valuation Date.  In the event of any changes to the terms of the Notes, we will notify you and you will be asked to accept such changes in connection with your purchase.  You may also choose to reject such changes in which case we may reject your offer to purchase.

PPS-2

SELECTED PURCHASE CONSIDERATIONS

The Notes are not suitable for all investors. The Notes may be a suitable investment for you if all of the following statements are true:

·You understand and accept that any positive return on the Notes will be limited to the Coupon Payments

·You do not anticipate that the Index Return will be less that -15.00% and you accept the risk that, if it is, you may lose up to 85.00% of the principal amount of your Notes (not including the Coupon Payments on the Notes)

·You are willing to accept the risks associated with an investment linked to the performance of the Index

·You do not seek an investment for which there will be an active secondary market and you are willing and able to hold the Notes to maturity

·You are willing to assume our credit risk for all payments on the Notes

·You are willing to consent to the exercise of any U.K. Bail-in Power by any relevant U.K. resolution authority

The Notes may not be a suitable investment for you if any of the following statements are true:

·You anticipate that the Index Return will be less than -15.00% and/or you are unwilling or unable to accept the risk that, if it is, you will up to 85.00% of the principal amount of your Notes (not including the Coupon Payments on the Notes)

·You seek an investment the return on which is not limited to the Coupon Payments on the Notes

·You are unwilling or unable to accept the risks associated with an investment linked to the performance of the Index

·You seek an investment for which there will be an active secondary market and/or you are unwilling or unable to hold the Notes to maturity

·You are unwilling or unable to assume our credit risk for all payments on the Notes

·You are unwilling or unable to consent to the exercise of any U.K. Bail-in Power by any relevant U.K. resolution authority

You must rely on your own evaluation of the merits of an investment in the Notes.  You should reach a decision whether to invest in the Notes after carefully considering, with your advisors, the suitability of the Notes in light of your investment objectives and the specific information set out in this preliminary pricing supplement, the prospectus supplement, the prospectus and the index supplement. Neither the Issuer nor Barclays Capital Inc. makes any recommendation as to the suitability of the Notes for investment.

ADDITIONAL TERMS OF THE NOTES

The Final Valuation Date and the Maturity Date are subject to postponement in certain circumstances, as described under “Reference Assets—Indices—Market Disruption Events for Securities with an Index of Equity Securities as a Reference Asset” and “Terms of the Notes—Payment Dates” in the accompanying prospectus supplement.

The Index and the Notes are subject to adjustment by the Calculation Agent under certain circumstances, as described under “Reference Assets—Indices—Adjustments Relating to Securities with an Index as a Reference Asset” in the accompanying prospectus supplement.

PPS-3

HYPOTHETICAL EXAMPLES OF AMOUNTS PAYABLE AT MATURITY

The following table illustrates the hypothetical total return at maturity on the Notes under various circumstances.  The “total return” as used in this preliminary pricing supplement is the number, expressed as a percentage, that results from comparing the aggregate payments per $1,000 principal amount Note to $1,000.  The hypothetical total returns set forth below are for illustrative purposes only and may not be the actual total returns applicable to a purchaser of the Notes.  The numbers appearing in the following table and examples have been rounded for ease of analysis.  The hypothetical examples below do not take into account any tax consequences from investing in the Notes and make the following key assumption:

§Hypothetical Initial Level: 100.00*

* The hypothetical Initial Level of 100.00 has been chosen for illustrative purposes only and does not represent a likely Initial Level. The Initial Level will be equal to the Closing Level of the Index on the Initial Valuation Date.

For information about recent levels of the Index, please see “Information Regarding the Index” in this preliminary pricing supplement.

Final Level	Index Return	Payment at Maturity(1)	Total Return on Notes(Including the Coupon Payments)
150.00	50.00%	$1,000.00	20.25%
140.00	40.00%	$1,000.00	20.25%
130.00	30.00%	$1,000.00	20.25%
120.00	20.00%	$1,000.00	20.25%
110.00	10.00%	$1,000.00	20.25%
105.00	5.00%	$1,000.00	20.25%
100.00	0.00%	$1,000.00	20.25%
90.00	-10.00%	$1,000.00	20.25%
85.00	-15.00%	$1,000.00	20.25%
80.00	-20.00%	$950.00	15.25%
70.00	-30.00%	$850.00	5.25%
60.00	-40.00%	$750.00	-4.75%
50.00	-50.00%	$650.00	-14.75%
40.00	-60.00%	$550.00	-24.75%
30.00	-70.00%	$450.00	-34.75%
20.00	-80.00%	$350.00	-44.75%
10.00	-90.00%	$250.00	-54.75%
0.00	-100.00%	$150.00	-64.75%

(1) per $1,000 principal amount Note, excluding the final Coupon Payment

The following examples illustrate how the total returns set forth in the table above are calculated:

Example 1: The level of the Index increases from an Initial Level of 100.00 to a Final Level of 120.00.

Because the Index Return is not less than -15.00%, you will receive a payment at maturity of $1,000.00 per $1,000 principal amount Note that you hold, plus the final Coupon Payment on the Notes.

The total return on investment of the Notes is 20.25%, the maximum possible return on the Notes.

Example 2: The level of the Index increases from an Initial Level of 100.00 to a Final Level of 90.00.

Because the Index Return is not less than -15.00%, you will receive a payment at maturity of $1,000.00 per $1,000 principal amount Note that you hold, plus the final Coupon Payments on the Notes.

The total return on investment of the Notes is 20.25%, the maximum possible return on the Notes.

Example 3: The level of the Index decreases from an Initial Level of 100.00 to a Final Level of 70.00.

Because the Index Return is less than -15.00%, you will receive a payment at maturity of $850.00 per $1,000 principal amount Note that you hold (plus the final Coupon Payment on your Notes), calculated as follows

$1,000 + [$1,000 x (Index Return + Buffer Percentage)]

$1,000 + [$1,000 x (-30.00% + 15.00%)] = $850.00

The total return on investment of the Notes is 5.25%.

Example 4: The level of the Index decreases from an Initial Level of 100.00 to a Final Level of 30.00.

Because the Index Return is less than -15.00%, you will receive a payment at maturity of $450.00 per $1,000 principal amount Note that you hold (plus the final Coupon Payment on your Notes), calculated as follows:

$1,000 + [$1,000 x (Index Return + Buffer Percentage)]

$1,000 + [$1,000 x (-70.00% + 15.00%)] = $450.00

The total return on investment of the Notes is -34.75%.

PPS-4

SELECTED RISK CONSIDERATIONS

An investment in the Notes involves significant risks.  Investing in the Notes is not equivalent to investing directly in the Index or its components. These risks are explained in more detail in the “Risk Factors” section of the prospectus supplement, including the risk factors discussed under the following headings of the prospectus supplement:

·     “Risk Factors—Risks Relating to the Securities Generally”; and

·     “Risk Factors—Additional Risks Relating to Securities with Reference Assets That Are Equity Securities, Indices of Equity Securities or Exchange-Traded Funds that Hold Equity Securities”.

In addition to the risks described above, you should consider the following:

·     Your Investment in the Notes May Result in a Significant Loss—The Notes do not guarantee any return of principal.  If the Index Return is less than -15.00%, you will lose 1.00% of the principal amount of your Notes for every 1.00% that the Index Return falls below -15.00%. You may lose up to 85.00% of the principal amount of your Notes (not including the Coupon Payments on the Notes).

·     Potential Return Limited to the Coupon Payments on the Notes—The positive return on the Notes is limited to the Coupon Payments.  You will not participate in any appreciation in the level of the Index and you will not receive more than the principal amount of your Notes at maturity (plus the final Coupon Payment) even if the Index Return is positive.

·     The Notes are Subject to Volatility Risk—Volatility is a measure of the magnitude of the movements of the price of an asset (or level of an index) over a period of time. The Coupon Payment amount is based on a number of factors, including the expected volatility of the Index. The Coupon Payment amount is higher than the fixed rate that we would pay on a conventional debt security of the same tenor and is higher than it otherwise would have been had the expected volatility of the Index been lower. As volatility of the Index increases, there will typically be a greater likelihood that the level of the Index will decline such that the Index Return falls below -15.00%.

Accordingly, you should understand that the Coupon Payment amount reflects, among other things, an indication of a greater likelihood that you will incur a loss of principal at maturity than would have been the case had the Coupon Payment amount been lower. In addition, actual volatility over the term of the Notes may be significantly higher than expected volatility at the time the terms of the Notes were determined. If actual volatility is higher than expected, you will face an even greater risk that you will lose some of your principal at maturity for the reasons described above.

·     The Payment at Maturity of Your Notes is Not Based on the Level of the Index at Any Time Other than the Closing Level on the Final Valuation Date—The Final Level and the Index Return will be based solely on the Closing Level of the Index on the Final Valuation Date.  Therefore, if the level of the Index drops on the Final Valuation Date, the payment at maturity that you will receive for your Notes may be significantly less than it would otherwise have been had such payment been linked to the level of the Index prior to such drop.

·     Credit of Issuer—The Notes are senior unsecured debt obligations of the issuer, Barclays Bank PLC and are not, either directly or indirectly, an obligation of any third party.  Any payment to be made on the Notes is subject to the ability of Barclays Bank PLC to satisfy its obligations as they come due and is not guaranteed by any third party.  In the event Barclays Bank PLC were to default on its obligations, you may not receive any amounts owed to you under the terms of the Notes.

·     You May Lose Some or All of Your Investment If Any U.K. Bail-in Power Is Exercised by the Relevant U.K. Resolution Authority—Notwithstanding any other agreements, arrangements or understandings between Barclays Bank PLC and any holder of the Notes, by acquiring the Notes, each holder of the Notes acknowledges, accepts, agrees to be bound by, and consents to the exercise of, any U.K. Bail-in Power by the relevant U.K. resolution authority as set forth under “Consent to U.K. Bail-in Power” in this preliminary pricing supplement. Accordingly, any U.K. Bail-in Power may be exercised in such a manner as to result in you and other holders of the Notes losing all or a part of the value of your investment in the Notes or receiving a different security from the Notes, which may be worth significantly less than the Notes and which may have significantly fewer protections than those typically afforded to debt securities. Moreover, the relevant U.K. resolution authority may exercise the U.K. Bail-in Power without providing any advance notice to, or requiring the consent of, the holders of the Notes. The exercise of any U.K. Bail-in Power by the relevant U.K. resolution authority with respect to the Notes will not be a default or an Event of Default (as each term is defined in the indenture) and the trustee will not be liable for any action that the trustee takes, or abstains from taking, in either case, in accordance with the exercise of the U.K. Bail-in Power by the relevant U.K. resolution authority with respect to the Notes. See “Consent to U.K. Bail-in Power” in this preliminary pricing supplement as well as “U.K. Bail-in Power,” “Risk Factors—Risks Relating to the Securities Generally—Regulatory action in the event a bank or investment firm in the Group is failing or likely to fail could materially adversely affect the value of the securities” and “Risk Factors—Risks Relating to the Securities Generally—Under the terms of the securities, you have agreed to be bound by the exercise of any U.K. Bail-in Power by the relevant U.K. resolution authority” in the accompanying prospectus supplement.

·     No Interest or Dividend Payments or Voting Rights—As a holder of the Notes, you will not receive interest payments, and you will not have voting rights or rights to receive cash dividends or other distributions or other rights that holders of securities underlying the Index would have.

·     Historical Performance of the Index Should Not Be Taken as Any Indication of the Future Performance of the Index Over the Term of the Notes—The level of the Index has fluctuated in the past and may, in the future, experience significant fluctuations. The historical performance of the Index is not an indication of the future performance of the Index over the term of the Notes. Therefore, the performance of the Index over the term of the Notes may bear no relation or resemblance to the historical performance of the Index.

PPS-5

·     Risks Associated with Small Capitalization Stocks May Affect the Notes—The Index is intended to track the small capitalization segment of the U.S. equity market. The stock prices of smaller sized companies may be more volatile than stock prices of large capitalization companies. Small capitalization companies may be less able to withstand adverse economic, market, trade and competitive conditions relative to larger companies. Small capitalization companies may be less likely to pay dividends on their stocks, and the presence of a dividend payment could be a factor that limits downward stock price pressure under adverse market conditions.

·     The Estimated Value of Your Notes is Expected to be Lower Than the Initial Issue Price of Your Notes—The estimated value of your Notes on the Initial Valuation Date is expected to be lower, and may be significantly lower, than the initial issue price of your Notes.  The difference between the initial issue price of your Notes and the estimated value of the Notes is expected as a result of certain factors, such as any sales commissions expected to be paid to Barclays Capital Inc. or another affiliate of ours, any selling concessions, discounts, commissions or fees expected to be allowed or paid to non-affiliated intermediaries, the estimated profit that we or any of our affiliates expect to earn in connection with structuring the Notes, the estimated cost which we may incur in hedging our obligations under the Notes, and estimated development and other costs which we may incur in connection with the Notes.

·     The Estimated Value of Your Notes Might be Lower if Such Estimated Value Were Based on the Levels at Which Our Debt Securities Trade in the Secondary Market—The estimated value of your Notes on the Initial Valuation Date is based on a number of variables, including our internal funding rates.  Our internal funding rates may vary from the levels at which our benchmark debt securities trade in the secondary market.  As a result of this difference, the estimated values referenced above might be lower if such estimated values were based on the levels at which our benchmark debt securities trade in the secondary market.

·     The Estimated Value of the Notes is Based on Our Internal Pricing Models, Which May Prove to be Inaccurate and May be Different from the Pricing Models of Other Financial Institutions—The estimated value of your Notes on the Initial Valuation Date is based on our internal pricing models, which take into account a number of variables and are based on a number of subjective assumptions, which may or may not materialize.  These variables and assumptions are not evaluated or verified on an independent basis. Further, our pricing models may be different from other financial institutions’ pricing models and the methodologies used by us to estimate the value of the Notes may not be consistent with those of other financial institutions which may be purchasers or sellers of Notes in the secondary market.  As a result, the secondary market price of your Notes may be materially different from the estimated value of the Notes determined by reference to our internal pricing models.

·     The Estimated Value of Your Notes Is Not a Prediction of the Prices at Which You May Sell Your Notes in the Secondary Market, if any, and Such Secondary Market Prices, If Any, Will Likely be Lower Than the Initial Issue Price of Your Notes and Maybe Lower Than the Estimated Value of Your Notes—The estimated value of the Notes will not be a prediction of the prices at which Barclays Capital Inc., other affiliates of ours or third parties may be willing to purchase the Notes from you in secondary market transactions (if they are willing to purchase, which they are not obligated to do).  The price at which you may be able to sell your Notes in the secondary market at any time will be influenced by many factors that cannot be predicted, such as market conditions, and any bid and ask spread for similar sized trades, and may be substantially less than our estimated value of the Notes.  Further, as secondary market prices of your Notes take into account the levels at which our debt securities trade in the secondary market, and do not take into account our various costs related to the Notes such as fees, commissions, discounts, and the costs of hedging our obligations under the Notes, secondary market prices of your Notes will likely be lower than the initial issue price of your Notes.  As a result, the price, at which Barclays Capital Inc., other affiliates of ours or third parties may be willing to purchase the Notes from you in secondary market transactions, if any, will likely be lower than the price you paid for your Notes, and any sale prior to the maturity date could result in a substantial loss to you.

·     The Temporary Price at Which We May Initially Buy The Notes in the Secondary Market And the Value We May Initially Use for Customer Account Statements, If We Provide Any Customer Account Statements At All, May Not Be Indicative of Future Prices of Your Notes—Assuming that all relevant factors remain constant after the Initial Valuation Date, the price at which Barclays Capital Inc. may initially buy or sell the Notes in the secondary market (if Barclays Capital Inc. makes a market in the Notes, which it is not obligated to do) and the value that we may initially use for customer account statements, if we provide any customer account statements at all, may exceed our estimated value of the Notes on the Initial Valuation Date, as well as the secondary market value of the Notes, for a temporary period after the initial issue date of the Notes.  The price at which Barclays Capital Inc. may initially buy or sell the Notes in the secondary market and the value that we may initially use for customer account statements may not be indicative of future prices of your Notes.

·     We and Our Affiliates’ May Engage in Various Activities or Make Determinations That Could Materially Affect the Notes in Various Ways and Create Conflicts of Interest—We and our affiliates play a variety of roles in connection with the issuance of the Notes, as described below. In performing these roles, our and our affiliates’ economic interests are potentially adverse to your interests as an investor in the Notes.

We and our affiliates make markets in and trade various financial instruments or products for our accounts and for the account of our clients and otherwise provide investment banking and other financial services with respect to these financial instruments and products. These financial instruments and products may include securities, derivative instruments or assets that may relate to the Index or its components. In any such market making, trading and hedging activity, and other services, we or our affiliates may take positions or take actions that are inconsistent with, or adverse to, the investment objectives of holders of the Notes. We and our affiliates have no obligation to take the needs of any buyer, seller or holder of the Notes into account in conducting these

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activities. Such market making, trading and hedging activity, investment banking and other financial services may negatively impact the value of the Notes.

In addition, the role played by Barclays Capital Inc., as the agent for the Notes, could present significant conflicts of interest with the role of Barclays Bank PLC, as issuer of the Notes.  For example, Barclays Capital Inc. or its representatives may derive compensation or financial benefit from the distribution of the Notes. Furthermore, we and our affiliates establish the offering price of the Notes for initial sale to the public, and the offering price is not based upon any independent verification or valuation.

In addition to the activities described above, we will also act as the Calculation Agent for the Notes.  As Calculation Agent, we will determine any values of the Index and make any other determinations necessary to calculate any payments on the Notes. In making these determinations, we may be required to make certain discretionary judgments relating to the Index and the Notes. In making these discretionary judgments, our economic interests are potentially adverse to your interests as an investor in the Notes, and any of these determinations may adversely affect any payments on the Notes.

·     Lack of Liquidity—The Notes will not be listed on any securities exchange.  Barclays Capital Inc. and other affiliates of Barclays Bank PLC intend to make a secondary market for the Notes but are not required to do so, and may discontinue any such secondary market making at any time, without notice.  Barclays Capital Inc. may at any time hold unsold inventory, which may inhibit the development of a secondary market for the Notes. Even if there is a secondary market, it may not provide enough liquidity to allow you to trade or sell the Notes easily.  Because other dealers are not likely to make a secondary market for the Notes, the price at which you may be able to trade your Notes is likely to depend on the price, if any, at which Barclays Capital Inc. and other affiliates of Barclays Bank PLC are willing to buy the Notes. The Notes are not designed to be short-term trading instruments.  Accordingly, you should be able and willing to hold your Notes to maturity.

·     Tax Treatment—Significant aspects of the tax treatment of the Notes are uncertain. You should consult your tax advisor about your tax situation. See “Tax Considerations” below.

·     Many Economic and Market Factors Will Impact the Value of the Notes—The value of the Notes will be affected by a number of economic and market factors that interact in complex and unpredictable ways and that may either offset or magnify each other, including:

o     the level of the Index and the market price of the Index components;

o     expected volatility of the Index and the Index components;

o     the time to maturity of the Notes;

o     the dividend rate on the Index components;

o     interest and yield rates in the market generally;

o     a variety of economic, financial, political, regulatory or judicial events;

o     supply and demand for the Notes; and

o     our creditworthiness, including actual or anticipated downgrades in our credit ratings.

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INFORMATION REGARDING THE INDEX

The Index is designed to track the performance of the small capitalization segment of the U.S. equity market.  For more information about the Index, please see “Indices—The Russell Indices” in the accompanying index supplement.

Historical Performance of the Index

The table below shows the high, low and final Closing Levels of the Index for each of the periods noted below. The graph below sets forth the historical performance of the Index based on daily Closing Levels from January 1, 2012 through August 28, 2017. We obtained the Closing Levels listed in the table below and shown in the graph below from Bloomberg, L.P. We have not independently verified the accuracy or completeness of the information obtained from Bloomberg, L.P.

Period/Quarter Ended	Quarterly High	Quarterly Low	Quarterly Close
March 31, 2012	846.13	747.28	830.30
June 30, 2012	840.63	737.24	798.49
September 30, 2012	864.70	767.75	837.45
December 31, 2012	852.49	769.48	849.35
March 31, 2013	953.07	872.60	951.54
June 30, 2013	999.99	901.51	977.48
September 30, 2013	1,078.41	989.54	1,073.79
December 31, 2013	1,163.64	1,043.46	1,163.64
March 31, 2014	1,208.65	1,093.59	1,173.04
June 30, 2014	1,192.96	1,095.99	1,192.96
September 30, 2014	1,208.15	1,101.68	1,101.68
December 31, 2014	1,219.11	1,049.30	1,204.70
March 31, 2015	1,266.37	1,154.71	1,252.77
June 30, 2015	1,295.80	1,215.42	1,253.95
September 30, 2015	1,273.33	1,083.91	1,100.69
December 31, 2015	1,204.16	1,097.55	1,135.89
March 31, 2016	1,114.03	953.72	1,114.03
June 30, 2016	1,188.95	1,089.65	1,151.92
September 30, 2016	1,263.44	1,139.45	1,251.65
December 31, 2016	1,388.07	1,156.89	1,357.13
March 31, 2017	1,413.64	1,345.60	1,385.92
June 30, 2017	1,425.98	1,345.24	1,415.36
August 28, 2017*	1,450.39	1,356.91	1,382.23
* For the period beginning on July 1, 2017 and ending on August 28, 2017

Historical Performance of the Russell 2000® Index

PAST PERFORMANCE IS NOT INDICATIVE OF FUTURE RESULTS

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TAX CONSIDERATIONS

Due to the lack of direct legal authority, there is substantial uncertainty regarding the U.S. federal income tax consequences of an investment in the Notes. Our special tax counsel, Davis Polk & Wardwell LLP, believes that it is reasonable to treat a Note for U.S. federal income tax purposes as a put option (the “Put Option”) written by you to us with respect to the Index, secured by a cash deposit equal to the initial issue price of the Note (the “Deposit”), which will have an annual yield based on our cost of borrowing, as shown below. If this treatment is respected, only a portion of each coupon payment will be attributable to interest on the Deposit; the remainder will represent premium attributable to your grant of the Put Option (“Put Premium”). We will determine the portion of each coupon payment that we will allocate to interest on the Deposit and to Put Premium, respectively, and will provide that allocation in the pricing supplement for the Notes. By purchasing the Notes, you agree to treat the Notes for U.S. federal income tax purposes consistently with the treatment and allocation as described above. We will follow this approach in determining our information reporting responsibilities, if any.

Assuming the treatment and allocation described above are respected, interest on the Deposit will be taxed as ordinary income, while the Put Premium will not be taken into account prior to the taxable disposition of the Notes (including redemption at maturity). Assuming that you are an initial purchaser of Notes purchasing the Notes at the initial issue price for cash, (i) if your Notes are held to maturity and the Put Option expires unexercised (i.e., you receive a cash payment (not including the final coupon payment) at maturity equal to the amount of the Deposit), you will recognize short-term capital gain in an amount equal to the total Put Premium received, and (ii) if, instead, the Put Option is deemed to be exercised at maturity (i.e., you receive a cash payment at maturity (not including the final coupon payment) that is less than the amount of the Deposit), you will recognize short-term capital gain or loss in an amount equal to the difference between (x) the total Put Premium received and (y) the cash settlement value of the Put Option (i.e., the amount of the Deposit minus the cash you receive at maturity, not including the final coupon payment).

There are, however, other reasonable treatments that the Internal Revenue Service (the “IRS”) or a court may adopt for the Notes, in which case the timing and character of your income or loss could be materially and adversely affected. In addition, in 2007 the U.S. Treasury Department and the IRS released a notice requesting comments on the U.S. federal income tax treatment of “prepaid forward contracts” and similar instruments. The notice focuses on a number of issues, the most relevant of which for investors in the Notes are the character of income or loss (including whether the Put Premium might be currently included as ordinary income) and the degree, if any, to which income realized by non-U.S. investors should be subject to withholding tax. While it is not clear whether the Notes would be viewed as similar to the typical prepaid forward contract described in the notice, it is possible that any Treasury regulations or other guidance promulgated after consideration of these issues could materially and adversely affect the tax consequences of an investment in the Notes, possibly with retroactive effect. You should consult your tax advisor regarding all aspects of the U.S. federal income tax consequences of an investment in the Notes, including possible alternative treatments and the issues presented by this notice. Purchasers who are not initial purchasers of Notes at the initial issue price should also consult their tax advisors with respect to the tax consequences of an investment in the Notes, including possible alternative treatments, as well as the allocation of the purchase price of the Notes between the Deposit and the Put Option.

You should review carefully the sections entitled “Material U.S. Federal Income Tax Consequences—Tax Consequences to U.S. Holders—Notes Treated as Put Options and Deposits” and, if you are a non-U.S. holder, “—Tax Consequences to Non-U.S. Holders,” in the accompanying prospectus supplement. The preceding discussion, when read in combination with those sections, constitutes the full opinion of our special tax counsel regarding the material U.S. federal income tax consequences of owning and disposing of the Notes.

Treasury regulations under Section 871(m) imposing a withholding tax on certain “dividend equivalents” under certain “equity linked instruments” exclude from their scope instruments issued in 2017 that do not have a “delta of one” with respect to underlying securities that could pay U.S.-source dividends for U.S. federal income tax purposes (each an “Underlying Security”). Based on our determination that the Notes do not have a “delta of one” within the meaning of the regulations, we expect that these regulations will not apply to the Notes with regard to non-U.S. holders. Our determination is not binding on the IRS, and the IRS may disagree with this determination. Section 871(m) is complex and its application may depend on your particular circumstances, including whether you enter into other transactions with respect to an Underlying Security. If necessary, further information regarding the potential application of Section 871(m) will be provided in the pricing supplement for the Notes. You should consult your tax advisor regarding the potential application of Section 871(m) to the Notes.

Consistent with the position described above, below are the portions of each coupon payment that we intend, in determining our reporting responsibilities (if any), to treat as attributable to interest on the Deposit and to Put Premium:

Coupon Payment rate per Annum(1)	Interest on Deposit per Annum(1)	Put Premium per Annum(1)
4.05%	%	%

(1) To be determined on the Initial Valuation Date

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SUPPLEMENTAL PLAN OF DISTRIBUTION

We will agree to sell to Barclays Capital Inc. (the “Agent”), and the Agent will agree to purchase from us, the principal amount of the Notes, and at the price, specified on the cover of the related pricing supplement, the document that will be filed pursuant to Rule 424(b) containing the final pricing terms of the Notes. The Agent will commit to take and pay for all of the Notes, if any are taken.

We expect that delivery of the Notes will be made against payment for the Notes on or about the Issue Date indicated on the cover of this preliminary pricing supplement, which will be the third business day following the Initial Valuation Date (this settlement cycle being referred to as “T+3”). Under Rule 15c6-1 of the Securities Exchange Act of 1934, as amended, effective September 5, 2017, trades in the secondary market generally will be required to settle in two business days, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the Notes on any date prior to two business days before delivery will be required, by virtue of the fact that the Notes will initially settle in three business days (T+3), to specify alternative settlement arrangements to prevent a failed settlement. See “Plan of Distribution (Conflicts of Interest)” in the prospectus supplement.

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