Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-03-31 |
As at 2023-03-31 |
As at 2022-03-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
16,61 1 . 5
GBP
|
15 , 395 .9
GBP
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments accounted for using equity method |
1 ,963. 2
GBP
|
1,975,700,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Other non-current receivables |
170. 1
GBP
|
149. 5
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
421 .6
GBP
|
5 41 . 1
GBP
|
— |
| Non-current derivative financial assets |
64,200,000
GBP
|
24 6 . 0
GBP
|
— |
| Non-current investments other than investments accounted for using equity method |
3,200,000
GBP
|
2 7. 4
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
2 ,65 4. 1
GBP
|
3 , 24 5 . 1
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
343 .0
GBP
|
3 94 .9
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
1 ,035 .9
GBP
|
891 .8
GBP
|
1 , 049. 3
GBP
|
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
536. 1
GBP
|
759. 2
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
8,00 5.7
GBP
|
7, 2 3 9 . 3
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings |
1, 128 .0
GBP
|
1 , 820.6
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Current borrowings and current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Trade and other non-current payables |
1 ,092 .8
GBP
|
959,900,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
3,3 22.5
GBP
|
2,65 8.6
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current derivative financial liabilities |
222 .2
GBP
|
243 . 3
GBP
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
345. 2
GBP
|
1 ,021 .0
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
5 48.1
GBP
|
5 4 7. 0
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
7, 3 4 5 . 0
GBP
|
6 , 6 5 7. 6
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
2 .6
GBP
|
32 .1
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
52 .6
GBP
|
52 .6
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
28, 270 .2
GBP
|
27,177,100,000
GBP
|
— |
| Liabilities |
1 6 , 4 6 7. 1
GBP
|
16 , 093 . 9
GBP
|
— |
| Assets (liabilities) |
11 ,8 03 .1
GBP
|
1 1,08 3. 2
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
5, 358.9
GBP
|
5,76 5.8
GBP
|
— |
| Current liabilities |
4,860. 8
GBP
|
5,543,100,000
GBP
|
— |
| Assets less current liabilities [abstract] |