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Trading assets and liabilities (Details) - GBP (£)
£ in Millions
Dec. 31, 2021
Dec. 31, 2020
Securities    
Total £ 59,158 £ 68,990
Deposits    
Total 64,598 72,256
Trading liabilities    
Deposits    
Repos 19,389 19,036
Collateral received 17,718 23,229
Other deposits 1,553 1,804
Total deposits 38,660 44,069
Debt securities in issue 974 1,408
Short positions 24,964 26,779
Total 64,598 72,256
Trading assets    
Loans    
Reverse repos 20,742 19,404
Collateral given 12,047 18,760
Other loans 1,414 1,611
Total loans 34,203 39,775
Securities    
Financial institutions and corporate 3,778 3,446
Total securities 24,955 29,215
Total 59,158 68,990
UK | Trading assets    
Securities    
Central and local government securities 6,919 4,184
USA | Trading assets    
Securities    
Central and local government securities 3,329 5,149
Other | Trading assets    
Securities    
Central and local government securities £ 10,929 £ 16,436