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 |
180,900,000
GBP
|
186,300,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
982,600,000
GBP
|
704,800,000
GBP
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments in joint ventures accounted for using equity method |
1,300,000
GBP
|
1,500,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Other non-current receivables |
8,400,000
GBP
|
6,500,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
1,500,000
GBP
|
800,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
701,400,000
GBP
|
692,000,000
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
656,000,000
GBP
|
616,300,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash [abstract] | |||
| Cash |
258,700,000
GBP
|
260,300,000
GBP
|
— |
| Cash and cash equivalents |
96,000,000
GBP
|
120,500,000
GBP
|
158,400,000
GBP
|
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
2,600,000
GBP
|
1,800,000
GBP
|
— |
| Classes of other provisions [abstract] | |||
| Other provisions [abstract] | |||
| Other non-current provisions |
4,200,000
GBP
|
4,700,000
GBP
|
— |
| Other current provisions |
5,000,000
GBP
|
1,800,000
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
440,300,000
GBP
|
184,600,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Other non-current payables |
17,300,000
GBP
|
9,300,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
602,700,000
GBP
|
658,900,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
27,200,000
GBP
|
37,200,000
GBP
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
1,100,000
GBP
|
1,700,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
1,038,900,000
GBP
|
954,300,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
2,898,400,000
GBP
|
2,544,000,000
GBP
|
— |
| Liabilities |
1,465,500,000
GBP
|
1,199,100,000
GBP
|
— |
| Assets (liabilities) |
1,432,900,000
GBP
|
1,344,900,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
1,641,400,000
GBP
|
1,590,300,000
GBP
|
— |
| Current liabilities |
815,300,000
GBP
|
838,900,000
GBP
|
— |
| Assets less current liabilities [abstract] |