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Taxation (Tables)
6 Months Ended
Jun. 30, 2021
Disclosure of income tax [Abstract]  
Schedule of relationship between tax expense and accounting profit
An explanation of the relationship between tax expense and accounting profit is set out below:
Half-year
to 30 June
2021
Half-year
to 30 June
2020
Half-year
to 31 Dec
2020
£m£m£m
Profit (loss) before tax3,905 (602)1,828 
UK corporation tax thereon at 19 per cent (2020: 19 per cent)
(742)114 (347)
Impact of surcharge on banking profits(229)44 (151)
Non-deductible costs: conduct charges(7)(11)(13)
Non-deductible costs: bank levy — (38)
Other non-deductible costs(67)(40)(34)
Non-taxable income35 76 (17)
Tax relief on coupons on other equity instruments40 44 42 
Tax-exempt gains on disposals36 78 
Tax losses where no deferred tax recognised(9)(1)(57)
Remeasurement of deferred tax due to rate changes970 354 (4)
Differences in overseas tax rates(25)13 
Policyholder tax(36)(23)(23)
Policyholder deferred tax asset in respect of life assurance expenses4 — 49 
Adjustments in respect of prior years(10)48 56 
Tax effect of share of results of joint ventures — (3)
Tax (expense) credit(40)621 (460)