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Operating expenses (Details) - GBP (£)
£ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Operating expenses      
Salaries £ 2,477 £ 2,483 £ 2,250
Bonus awards 411 353 334
Temporary and contract costs 162 199 234
Social security costs 371 352 328
Pension costs 311 313 363
- defined benefit schemes 86 122 205
- defined contribution schemes 225 191 158
Other 329 201 207
Staff costs 4,061 3,901 3,716
Premises and equipment 1,211 1,153 1,112
UK bank levy 142 109 101
Depreciation and amortisation 1,058 934 833
Other administrative expenses 1,677 1,899 1,925
Administrative expenses 4,088 4,095 3,971
Operating expenses 8,149 7,996 7,687
Depreciation on right of use assets £ 103 £ 104 £ 119