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Finance cost (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finance cost
Hedged interest payable on medium-term notes issued	£ 61	£ 61	£ 39
Interest payable on bank loans and overdrafts	51	42	5
Interest payable on RCF	1	3	1
Interest payable on foreign exchange swaps	44	44	19
Interest payable on leases	24	25	10
Amortisation of discount on provisions	11	14	3
Foreign exchange loss on translation of foreign assets/liabilities	5
Fair value loss on hedge ineffectiveness			2
Total finance cost	£ 197	£ 189	£ 79

X

- Definition

The amount of expense recognised due to the unwinding of the discount on provisions other than provisions for employee benefits, resulting from the effect of the passage of time. [Refer: Other provisions]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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X

- Definition

The amount of costs associated with financing activities of the entity.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The gross loss arising from exchange differences recognised in profit or loss, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: Foreign exchange gain (loss)]

+ References

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- Definition

The amount of interest expense on bank loans and overdrafts. [Refer: Interest expense; Bank overdrafts]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The amount of interest expense on debt instruments issued. [Refer: Interest expense; Debt instruments issued]

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- Definition

The amount of interest expense on lease liabilities. [Refer: Lease liabilities]

+ References

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- Definition

Fair value loss on hedge ineffectiveness

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Amount of losses on fair value adjustment on debt repayment.

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- Definition

Interest payable on revolving credit facility

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No definition available.

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