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Financial risk management objectives and policies - Analysis of Future Anticipated Cash Flows Related to Debt (Details) - GBP (£) £ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Bank overdrafts | £ (171) | £ (358) |
Effect of discounting/financing rates, bank overdrafts | 0 | 0 |
Bank overdrafts | (171) | (358) | £ (506)
Bonds | (5,161) | (5,281) |
Effect of discounting/financing rates, bonds | 1,004 | 918 |
Bonds | (4,157) | (4,363) |
Gross lease liabilities | (2,692) | (2,772) |
Effect of discounting/financing rates, lease liabilities | 672 | 618 |
Lease liability at end of year | (2,020) | (2,154) | £ (2,210)
Borrowings and leases | (8,024) | (8,411) |
Effect of discounting/financing rates, borrowings | 1,676 | 1,536 |
Total borrowings | (6,348) | (6,875) |
Trade payables and other financial liabilities | (12,298) | (12,593) |
Effect of discounting/financing rates, Trade payables and other financial liabilities | 26 | 52 |
Trade payables and other financial liabilities | (12,272) | (12,541) |
Total non-derivative financial instruments | (20,322) | (21,004) |
Effect of discounting/financing rates, Total non-derivative financial instruments | 1,702 | 1,588 |
Total non-derivative financial instruments | (18,620) | (19,416) |
Total derivative financial instruments | (186) | 24 |
Effect of discounting/financing rates, Total derivative financial instruments | 134 | 7 |
Total derivative financial instruments | (52) | 31 |
Financial liabilities, undiscounted cash flows | (20,508) | (20,980) |
Effect of discounting/financing rates | 1,836 | 1,595 |
Total | (18,672) | (19,385) |
Deferred income and customer advances | (1,160) | (1,319) |
Within one year |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Bank overdrafts | (171) | (358) |
Bonds | (536) | (711) |
Gross lease liabilities | (353) | (406) |
Borrowings and leases | (1,060) | (1,475) |
Trade payables and other financial liabilities | (12,130) | (12,335) |
Total non-derivative financial instruments | (13,190) | (13,810) |
Total derivative financial instruments | (52) | (26) |
Financial liabilities, undiscounted cash flows | (13,242) | (13,836) |
Between one and two years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Bank overdrafts | 0 | 0 |
Bonds | (736) | (535) |
Gross lease liabilities | (307) | (327) |
Borrowings and leases | (1,043) | (862) |
Trade payables and other financial liabilities | (76) | (84) |
Total non-derivative financial instruments | (1,119) | (946) |
Total derivative financial instruments | (20) | (8) |
Financial liabilities, undiscounted cash flows | (1,139) | (954) |
Between two and three years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Bank overdrafts | 0 | 0 |
Bonds | (723) | (746) |
Gross lease liabilities | (281) | (282) |
Borrowings and leases | (1,004) | (1,028) |
Trade payables and other financial liabilities | (45) | (131) |
Total non-derivative financial instruments | (1,049) | (1,159) |
Total derivative financial instruments | (18) | (5) |
Financial liabilities, undiscounted cash flows | (1,067) | (1,164) |
Between three and four years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Bank overdrafts | 0 | 0 |
Bonds | (542) | (726) |
Gross lease liabilities | (256) | (261) |
Borrowings and leases | (798) | (987) |
Trade payables and other financial liabilities | (25) | (13) |
Total non-derivative financial instruments | (823) | (1,000) |
Total derivative financial instruments | (26) | (5) |
Financial liabilities, undiscounted cash flows | (849) | (1,005) |
Between four and five years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Bank overdrafts | 0 | 0 |
Bonds | (359) | (704) |
Gross lease liabilities | (235) | (231) |
Borrowings and leases | (594) | (935) |
Trade payables and other financial liabilities | (13) | (10) |
Total non-derivative financial instruments | (607) | (945) |
Total derivative financial instruments | (24) | 68 |
Financial liabilities, undiscounted cash flows | (631) | (877) |
Over five years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Bank overdrafts | 0 | 0 |
Bonds | (2,265) | (1,859) |
Gross lease liabilities | (1,260) | (1,265) |
Borrowings and leases | (3,525) | (3,124) |
Trade payables and other financial liabilities | (9) | (20) |
Total non-derivative financial instruments | (3,534) | (3,144) |
Total derivative financial instruments | (46) | 0 |
Financial liabilities, undiscounted cash flows | (3,580) | (3,144) |
Trade and other receivable |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | 3,032 | 2,299 |
Effect of discounting/financing rates, Total derivative financial instruments | 0 | 0 |
Total derivative financial instruments | 0 | 0 |
Trade and other receivable | Within one year |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | 1,244 | 992 |
Trade and other receivable | Between one and two years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | 99 | 495 |
Trade and other receivable | Between two and three years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | 62 | 47 |
Trade and other receivable | Between three and four years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | 516 | 47 |
Trade and other receivable | Between four and five years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | 632 | 718 |
Trade and other receivable | Over five years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | 479 | 0 |
Trade and other payable |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | (3,218) | (2,275) |
Effect of discounting/financing rates, Total derivative financial instruments | 0 | 0 |
Total derivative financial instruments | 0 | 0 |
Trade and other payable | Within one year |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | (1,296) | (1,018) |
Trade and other payable | Between one and two years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | (119) | (503) |
Trade and other payable | Between two and three years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | (80) | (52) |
Trade and other payable | Between three and four years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | (542) | (52) |
Trade and other payable | Between four and five years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | (656) | (650) |
Trade and other payable | Over five years |  |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |  |
Total derivative financial instruments | £ (525) | £ 0 |

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