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Number Of Installments

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Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Rights, Percentage1

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Share-Based Compensation Arrangement By Share-Based Payment Award, Claw-Back Period

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Share-Based Payment Arrangement, Face Value Of Shares Awarded

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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The percentage of an expected dividend used to calculate the fair value of share options granted.

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The number of instruments granted in share-based payment arrangement.

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Report of Directors Corporate Governance - Scheme awards (Details) £ / shares in Units, £ in Thousands		12 Months Ended
	Feb. 24, 2020 GBP (£) shares	Dec. 31, 2021 installment £ / shares	Dec. 31, 2019	Feb. 21, 2020 £ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]
Closing share price (in GBP per share) \| £ / shares				£ 4.262
Long-Term Incentive Awards
Disclosure of terms and conditions of share-based payment arrangement [line items]
Performance period		3 years	3 years
Number of installments \| installment		5
Long-Term Incentive Awards \| Tranche 1
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Long-Term Incentive Awards \| Tranche 2
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Long-Term Incentive Awards \| Tranche 3
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Long-Term Incentive Awards \| Tranche 4
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Long-Term Incentive Awards \| Tranche 5
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Long-Term Incentive Awards
Disclosure of terms and conditions of share-based payment arrangement [line items]
Retention period		1 year
Maximum \| Long-Term Incentive Awards
Disclosure of terms and conditions of share-based payment arrangement [line items]
Claw-back period		10 years
Ewen Stevenson \| Long-Term Incentive Awards
Disclosure of terms and conditions of share-based payment arrangement [line items]
Face value awarded \| £	£ 2,716
Percentage receivable for minimum performance	25.00%
Number of shares awarded (in shares) \| shares	637,197
Award as a percentage of base salary		286.00%
Expected dividend yield		5.00%
Expected dividend yield (in gbp per share) \| £ / shares		£ 3.324
Ewen Stevenson \| Long-Term Incentive Awards \| Tranche 1
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Ewen Stevenson \| Long-Term Incentive Awards \| Tranche 2
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Ewen Stevenson \| Long-Term Incentive Awards \| Tranche 3
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Ewen Stevenson \| Long-Term Incentive Awards \| Tranche 4
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Ewen Stevenson \| Long-Term Incentive Awards \| Tranche 5
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Noel Quinn \| Long-Term Incentive Awards
Disclosure of terms and conditions of share-based payment arrangement [line items]
Face value awarded \| £	£ 4,767
Percentage receivable for minimum performance	25.00%
Number of shares awarded (in shares) \| shares	1,118,554
Award as a percentage of base salary		293.00%
Noel Quinn \| Deferred shares \| Tranche 1
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Noel Quinn \| Deferred shares \| Tranche 2
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Noel Quinn \| Deferred shares \| Tranche 3
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Noel Quinn \| Deferred shares \| Tranche 4
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%
Noel Quinn \| Deferred shares \| Tranche 5
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage		20.00%