Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2025-03-31 |
As at 2024-03-31 |
|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||
| Property, plant and equipment [abstract] | ||
| Property, plant and equipment |
13,307,200,000
GBP
|
11,766,900,000
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets other than goodwill [abstract] | ||
| Intangible assets other than goodwill |
206,500,000
GBP
|
186,500,000
GBP
|
| Goodwill |
117,300,000
GBP
|
112,800,000
GBP
|
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||
| Investments in joint ventures reported in separate financial statements |
1,600,000
GBP
|
12,400,000
GBP
|
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements |
–
GBP
|
–
GBP
|
| Trade and other non-current receivables [abstract] | ||
| Trade and other non-current receivables |
90,800,000
GBP
|
89,200,000
GBP
|
| Miscellaneous non-current assets [abstract] | ||
| Non-current net defined benefit asset |
5,300,000
GBP
|
5,400,000
GBP
|
| Non-current derivative financial assets |
59,900,000
GBP
|
71,200,000
GBP
|
| Trade and other current receivables [abstract] | ||
| Trade and other current receivables |
878,300,000
GBP
|
817,300,000
GBP
|
| Classes of current inventories [abstract] | ||
| Current inventories |
43,200,000
GBP
|
40,100,000
GBP
|
| Classes of current inventories, alternative [abstract] | ||
| Cash and cash equivalents [abstract] | ||
| Cash [abstract] | ||
| Balances with banks |
59,300,000
GBP
|
44,100,000
GBP
|
| Cash equivalents [abstract] | ||
| Short-term deposits, classified as cash equivalents |
988,800,000
GBP
|
909,100,000
GBP
|
| Cash and cash equivalents |
1,048,100,000
GBP
|
953,200,000
GBP
|
| Miscellaneous current assets [abstract] | ||
| Current derivative financial assets |
5,600,000
GBP
|
–
GBP
|
| Borrowings [abstract] | ||
| Current borrowings and current portion of non-current borrowings [abstract] | ||
| Current borrowings |
533,000,000
GBP
|
67,900,000
GBP
|
| Non-current portion of non-current borrowings, by type [abstract] | ||
| Non-current portion of other non-current borrowings |
9,164,100,000
GBP
|
8,195,300,000
GBP
|
| Trade and other non-current payables [abstract] | ||
| Trade and other non-current payables |
1,839,200,000
GBP
|
1,688,500,000
GBP
|
| Trade and other current payables [abstract] | ||
| Trade and other current payables |
862,200,000
GBP
|
724,700,000
GBP
|
| Miscellaneous non-current liabilities [abstract] | ||
| Non-current net defined benefit liability |
125,100,000
GBP
|
218,400,000
GBP
|
| Non-current derivative financial liabilities |
44,700,000
GBP
|
26,000,000
GBP
|
| Miscellaneous current liabilities [abstract] | ||
| Current derivative financial liabilities |
2,900,000
GBP
|
–
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
296,300,000
GBP
|
295,400,000
GBP
|
| Retained earnings [abstract] | ||
| Retained earnings |
78,100,000
GBP
|
7,900,000
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets (liabilities) |
1,770,800,000
GBP
|
1,834,000,000
GBP
|
| Net current assets (liabilities) [abstract] | ||
| Current assets |
1,975,200,000
GBP
|
1,810,600,000
GBP
|
| Current liabilities |
1,444,900,000
GBP
|
847,400,000
GBP
|
| Current assets (liabilities) |
530,300,000
GBP
|
963,200,000
GBP
|
| Assets less current liabilities [abstract] | ||
| Assets less current liabilities |
14,464,800,000
GBP
|
13,356,300,000
GBP
|