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Related party transactions (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Related party transactions
Cash ratio deposits	0.382%
Threshold eligible liabilities	£ 600.0
Main Pension Scheme
Related party transactions
Transfer of amount to reservoir trust to meet potential future contributions	471.0
Bank deposits held within entity	£ 36.2	£ 61.7
HM Treasury
Related party transactions
Proportion of ordinary shares in reporting entity held	37.97%

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- Definition

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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- Definition

Bank deposits held within entity

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- Definition

Cash ratio deposits (CRDs) are non-interest bearing deposits lodged with the bank of england by eligible institutions (ie. banks and building societies), who have reported average eligible liabilities (ELs) of over 600 million over a calculation period.

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- Definition

Proportion of ordinary shares in reporting entity held

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- Definition

The amount of threshold eligible liabilities to calculate non-interest bearing deposit used to determine the ratio deposit.

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- Definition

The transfer of amount to reservoir trust to meet potential future contributions.

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No definition available.

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