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Memorandum items - Contractual obligations of future (Details) - GBP (£)
£ in Millions
Dec. 31, 2023
Dec. 31, 2022
Contractual obligations for future expenditure    
Capital expenditure on property, plant and equipment £ 38 £ 8
Contracts to purchase goods or services 1,121 677
Total capital commitments 1,159 685
Within 1 year    
Contractual obligations for future expenditure    
Contracts to purchase goods or services £ 379 £ 321