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 |
222,900,000
GBP
|
194,000,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
472,300,000
GBP
|
325,200,000
GBP
|
— |
| Goodwill |
1,120,500,000
GBP
|
908,700,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
38,400,000
GBP
|
31,100,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
410,700,000
GBP
|
325,100,000
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
312,400,000
GBP
|
228,800,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
168,500,000
GBP
|
156,700,000
GBP
|
131,100,000
GBP
|
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
1,500,000
GBP
|
700,000
GBP
|
— |
| Miscellaneous assets [abstract] | |||
| Cash and bank balances at central banks |
169,500,000
GBP
|
157,400,000
GBP
|
— |
| Classes of other provisions [abstract] | |||
| Other provisions [abstract] | |||
| Other non-current provisions |
9,700,000
GBP
|
7,700,000
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
677,300,000
GBP
|
287,600,000
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings |
1,000,000
GBP
|
72,500,000
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 |
21,900,000
GBP
|
19,000,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
280,700,000
GBP
|
242,700,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
500,000
GBP
|
600,000
GBP
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
900,000
GBP
|
900,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
38,000,000
GBP
|
38,000,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
1,415,800,000
GBP
|
1,256,600,000
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
162,300,000
GBP
|
117,100,000
GBP
|
— |
| Reserve of cash flow hedges |
600,000
GBP
|
400,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
200,000
GBP
|
200,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
2,788,400,000
GBP
|
2,197,000,000
GBP
|
— |
| Liabilities |
1,189,500,000
GBP
|
793,900,000
GBP
|
— |
| Assets (liabilities) |
1,598,900,000
GBP
|
1,403,100,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
895,600,000
GBP
|
712,700,000
GBP
|
— |
| Current liabilities |
341,200,000
GBP
|
363,900,000
GBP
|
— |
| Current assets (liabilities) |
554,400,000
GBP
|
348,800,000
GBP
|
— |
| Assets less current liabilities [abstract] |