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Subordinated liabilities (Details) - GBP (£)
£ in Millions
Dec. 31, 2023
Dec. 31, 2022
Subordinated liabilities    
Dated loan capital £ 5,573 £ 5,968
Undated loan capital 22 173
Preference shares 119 119
Total subordinated liabilities £ 5,714 £ 6,260