Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-03-31 |
As at 2022-03-31 |
As at 2021-03-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
186,300,000
GBP
|
177,300,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
704,800,000
GBP
|
473,300,000
GBP
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments in joint ventures accounted for using equity method |
1,500,000
GBP
|
1,500,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Other non-current receivables |
6,500,000
GBP
|
3,000,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
800,000
GBP
|
300,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
692,000,000
GBP
|
594,300,000
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
616,300,000
GBP
|
529,500,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash [abstract] | |||
| Cash |
260,300,000
GBP
|
257,900,000
GBP
|
— |
| Cash and cash equivalents |
120,500,000
GBP
|
158,400,000
GBP
|
86,400,000
GBP
|
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
184,600,000
GBP
|
151,700,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Other non-current payables |
9,300,000
GBP
|
6,900,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
658,900,000
GBP
|
584,100,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
37,200,000
GBP
|
12,700,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
954,300,000
GBP
|
772,800,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
2,544,000,000
GBP
|
2,101,200,000
GBP
|
— |
| Liabilities |
1,199,100,000
GBP
|
992,700,000
GBP
|
— |
| Assets (liabilities) |
1,344,900,000
GBP
|
1,108,500,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
1,590,300,000
GBP
|
1,395,100,000
GBP
|
— |
| Current liabilities |
838,900,000
GBP
|
726,200,000
GBP
|
— |
| Assets less current liabilities [abstract] |