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 |
177,300,000
GBP
|
170,200,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
47 3.3
GBP
|
466. 4
GBP
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments in joint ventures accounted for using equity method |
1,500,000
GBP
|
1,100,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Other non-current receivables |
3,000,000
GBP
|
2,900,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
300,000
GBP
|
800,000
GBP
|
— |
| Non-current derivative financial assets |
–
GBP
|
1,100,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
594,300,000
GBP
|
493,600,000
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
52 9.5
GBP
|
419. 8
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash [abstract] | |||
| Cash |
257,900,000
GBP
|
197,900,000
GBP
|
— |
| Cash and cash equivalents |
158,400,000
GBP
|
86,400,000
GBP
|
3 4.8
GBP
|
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
151,700,000
GBP
|
147. 3
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
–
GBP
|
700,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Other non-current payables |
6,900,000
GBP
|
6,800,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
5 84.1
GBP
|
475,300,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
12,700,000
GBP
|
56,500,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
47. 1
GBP
|
47,000,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
772,800,000
GBP
|
587,800,000
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
60,900,000
GBP
|
39,000,000
GBP
|
— |
| Reserve of cash flow hedges |
700,000
GBP
|
1,400,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
2,101,200,000
GBP
|
1,8 45.8
GBP
|
— |
| Liabilities |
992. 7
GBP
|
9 46.4
GBP
|
— |
| Assets (liabilities) |
1,108. 5
GBP
|
899,400,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
1,395. 1
GBP
|
1,134,800,000
GBP
|
— |
| Current liabilities |
726,200,000
GBP
|
631. 8
GBP
|
— |
| Assets less current liabilities [abstract] |