Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-03-31 |
As at 2021-03-31 |
As at 2020-03-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
14,618,700,000
GBP
|
13,2 54.3
GBP
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments accounted for using equity method |
1 , 2 39. 5
GBP
|
1,64 3.5
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Other non-current receivables |
1 36 .4
GBP
|
1 1 5 .9
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
584,900,000
GBP
|
543 . 1
GBP
|
— |
| Non-current derivative financial assets |
371 .7
GBP
|
114 . 7
GBP
|
— |
| Non-current investments other than investments accounted for using equity method |
8,700,000
GBP
|
3,600,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
2, 21 1 .0
GBP
|
1,4 88. 2
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
266 .6
GBP
|
2 3 4 .9
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
1 ,049. 3
GBP
|
1 ,60 0. 2
GBP
|
16 4.6
GBP
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | |||
| Non-current assets or disposal groups classified as held for sale |
–
GBP
|
33 9. 1
GBP
|
— |
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
2 ,9 41 . 8
GBP
|
47 0. 9
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
7, 87 3 . 9
GBP
|
8, 47 3 .0
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
1 ,19 0.8
GBP
|
9 3 7. 6
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Trade and other non-current payables |
842 . 4
GBP
|
722,500,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
2 ,6 72 . 6
GBP
|
1 ,9 87. 3
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
–
GBP
|
186. 1
GBP
|
— |
| Non-current derivative financial liabilities |
5 4 9.6
GBP
|
452 .1
GBP
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
701 . 5
GBP
|
238,700,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
536 . 5
GBP
|
524 . 5
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
6 , 57 7. 3
GBP
|
3 ,92 1 . 1
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
6,600,000
GBP
|
400,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
49,200,000
GBP
|
49. 2
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
25 ,76 1 . 4
GBP
|
2 1 , 591 . 6
GBP
|
— |
| Liabilities |
1 6 , 5 8 7. 6
GBP
|
14 ,9 10. 5
GBP
|
— |
| Assets (liabilities) |
9, 17 3 . 8
GBP
|
6 ,681 . 1
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
6, 936 . 8
GBP
|
4 , 520 .9
GBP
|
— |
| Current liabilities |
4,658,200,000
GBP
|
3 , 50 9. 2
GBP
|
— |
| Assets less current liabilities [abstract] |