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Asset transfers (Details) - GBP (£)
£ in Millions
Dec. 31, 2024
Dec. 31, 2023
Securities repurchase agreements or lending transactions    
Fair value of transferred financial asset not derecognised £ 20,997 £ 16,962
Fair value of associated liabilities 20,394 16,522
Trading assets    
Securities repurchase agreements or lending transactions    
Fair value of transferred financial asset not derecognised 7,708 7,907
Loans to banks - amortised cost    
Securities repurchase agreements or lending transactions    
Fair value of transferred financial asset not derecognised 70 10
Loans to customers - amortised cost    
Securities repurchase agreements or lending transactions    
Fair value of transferred financial asset not derecognised 45 281
Other financial assets    
Securities repurchase agreements or lending transactions    
Fair value of transferred financial asset not derecognised £ 13,174 £ 8,764