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Asset transfers - Assets pledged as collateral (Details) - GBP (£)
£ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Asset transfers    
Assets pledged against liabilities £ 47,395 £ 49,682
Loans to customers and debt instruments transferred to provide collateral for issue of debt 8,965 11,076
Debt securities and other borrowings issued for which collateral is provided by transferred assets 3,512 4,105
Trading assets    
Asset transfers    
Assets pledged against liabilities 23,601 28,728
The loans and advances to banks    
Asset transfers    
Assets pledged against liabilities 62 49
The loans and advances to customers    
Asset transfers    
Assets pledged against liabilities 20,108 15,939
Financial assets (Other)    
Asset transfers    
Assets pledged against liabilities £ 3,624 £ 4,966