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Related parties (Details)
£ in Millions
12 Months Ended
Dec. 31, 2021
GBP (£)
Related party transactions  
Cash ratio deposits 0.406%
Threshold eligible liabilities £ 600
Associate  
Related party transactions  
Investment extended to ownership voting rights (as a percentage) 20.00%
Subsidiary | HM Treasury | NatWest Group plc  
Related party transactions  
Percentage of ownership interest 52.96%