Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||
| Property, plant and equipment [abstract] | ||
| Property, plant and equipment |
95,100,000
GBP
|
86,000,000
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets and goodwill |
218,100,000
GBP
|
218,600,000
GBP
|
| Investment property [abstract] | ||
| Investment property |
600,000
GBP
|
800,000
GBP
|
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||
| Investments in joint ventures reported in separate financial statements |
111,900,000
GBP
|
106,600,000
GBP
|
| Trade and other current receivables [abstract] | ||
| Trade and other current receivables |
453,500,000
GBP
|
461,600,000
GBP
|
| Current prepayments and current accrued income including current contract assets [abstract] | ||
| Current accrued income including current contract assets [abstract] | ||
| Current contract assets |
224,600,000
GBP
|
270,600,000
GBP
|
| Classes of current inventories [abstract] | ||
| Current inventories |
476,000,000
GBP
|
344,700,000
GBP
|
| Classes of current inventories, alternative [abstract] | ||
| Cash and cash equivalents [abstract] | ||
| Cash and cash equivalents |
544,200,000
GBP
|
541,300,000
GBP
|
| Borrowings [abstract] | ||
| Current borrowings and current portion of non-current borrowings [abstract] | ||
| Current borrowings |
51,800,000
GBP
|
80,600,000
GBP
|
| Trade and other non-current payables [abstract] | ||
| Trade and other non-current payables |
16,600,000
GBP
|
28,200,000
GBP
|
| Trade and other current payables [abstract] | ||
| Current accruals and current deferred income including current contract liabilities [abstract] | ||
| Current deferred income including current contract liabilities [abstract] | ||
| Current contract liabilities [abstract] | ||
| Current contract liabilities |
110,400,000
GBP
|
95,800,000
GBP
|
| Trade and other current payables |
1,130,300,000
GBP
|
1,087,000,000
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
2,400,000
GBP
|
2,400,000
GBP
|
| Retained earnings [abstract] | ||
| Retained earnings |
578,200,000
GBP
|
508,400,000
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets |
2,130,600,000
GBP
|
2,030,200,000
GBP
|
| Liabilities |
1,483,400,000
GBP
|
1,462,100,000
GBP
|
| Assets (liabilities) |
647,200,000
GBP
|
568,100,000
GBP
|
| Net current assets (liabilities) [abstract] | ||
| Current assets |
1,704,900,000
GBP
|
1,618,200,000
GBP
|
| Current liabilities |
1,400,200,000
GBP
|
1,361,100,000
GBP
|
| Current assets (liabilities) |
304,700,000
GBP
|
257,100,000
GBP
|
| Assets less current liabilities [abstract] |