Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-03-31 |
As at 2023-03-31 |
|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||
| Property, plant and equipment [abstract] | ||
| Property, plant and equipment |
11,766,900,000
GBP
|
10,716,900,000
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets other than goodwill [abstract] | ||
| Intangible assets other than goodwill |
186,500,000
GBP
|
185,900,000
GBP
|
| Goodwill |
112,800,000
GBP
|
92,700,000
GBP
|
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||
| Investments in joint ventures reported in separate financial statements |
12,400,000
GBP
|
16,500,000
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 |
89,200,000
GBP
|
88,400,000
GBP
|
| Miscellaneous non-current assets [abstract] | ||
| Non-current net defined benefit asset |
5,400,000
GBP
|
5,700,000
GBP
|
| Non-current derivative financial assets |
71,200,000
GBP
|
82,300,000
GBP
|
| Trade and other current receivables [abstract] | ||
| Trade and other current receivables |
817,300,000
GBP
|
750,900,000
GBP
|
| Classes of current inventories [abstract] | ||
| Current inventories |
40,100,000
GBP
|
35,400,000
GBP
|
| Classes of current inventories, alternative [abstract] | ||
| Cash and cash equivalents [abstract] | ||
| Cash [abstract] | ||
| Balances with banks |
44,100,000
GBP
|
34,200,000
GBP
|
| Cash equivalents [abstract] | ||
| Short-term deposits, classified as cash equivalents |
909,100,000
GBP
|
–
GBP
|
| Cash and cash equivalents |
953,200,000
GBP
|
34,200,000
GBP
|
| Miscellaneous current assets [abstract] | ||
| Current derivative financial assets |
–
GBP
|
500,000
GBP
|
| Borrowings [abstract] | ||
| Current borrowings and current portion of non-current borrowings [abstract] | ||
| Current borrowings |
67,900,000
GBP
|
317,400,000
GBP
|
| Non-current portion of non-current borrowings, by type [abstract] | ||
| Non-current portion of other non-current borrowings |
8,195,300,000
GBP
|
6,986,200,000
GBP
|
| Trade and other non-current payables [abstract] | ||
| Trade and other non-current payables |
1,688,500,000
GBP
|
1,479,600,000
GBP
|
| Trade and other current payables [abstract] | ||
| Trade and other current payables |
724,700,000
GBP
|
720,400,000
GBP
|
| Miscellaneous non-current liabilities [abstract] | ||
| Non-current net defined benefit liability |
218,400,000
GBP
|
285,100,000
GBP
|
| Non-current derivative financial liabilities |
26,000,000
GBP
|
11,300,000
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
295,400,000
GBP
|
249,100,000
GBP
|
| Retained earnings [abstract] | ||
| Retained earnings |
7,900,000
GBP
|
162,500,000
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets (liabilities) |
1,834,000,000
GBP
|
970,600,000
GBP
|
| Net current assets (liabilities) [abstract] | ||
| Current assets |
1,810,600,000
GBP
|
830,900,000
GBP
|
| Current liabilities |
847,400,000
GBP
|
1,090,200,000
GBP
|
| Current assets (liabilities) |
963,200,000
GBP
|
259,300,000
GBP
|
| Assets less current liabilities [abstract] | ||
| Assets less current liabilities |
13,356,300,000
GBP
|
11,058,400,000
GBP
|