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Other provisions (Tables)
6 Months Ended
Jun. 30, 2021
Disclosure of other provisions [abstract]  
Schedule of provisions and liabilities
Provisions
for financial
commitments
and guarantees
Regulatory
provisions
OtherTotal
£m£m£m£m
At 1 January 2021459 642 814 1,915 
Exchange and other adjustments(2)(4)(10)(16)
Provisions applied (398)(152)(550)
Charge for the period(98)425 82 409 
At 30 June 2021
359 665 734 1,758