Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2025-03-29 |
As at 2024-03-30 |
As at 2023-04-01 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
204,300,000
GBP
|
190,400,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
271,200,000
GBP
|
289,600,000
GBP
|
— |
| Goodwill |
702,700,000
GBP
|
702,700,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
648,700,000
GBP
|
810,000,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
115,000,000
GBP
|
115,700,000
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
101,500,000
GBP
|
98,900,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
191,500,000
GBP
|
102,300,000
GBP
|
63,400,000
GBP
|
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
100,000
GBP
|
–
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
325,200,000
GBP
|
325,700,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
260,100,000
GBP
|
264,600,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
–
GBP
|
208,500,000
GBP
|
— |
| Other non-current liabilities |
20,600,000
GBP
|
22,900,000
GBP
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
600,000
GBP
|
800,000
GBP
|
— |
| Other current liabilities |
1,000,000
GBP
|
–
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
86,900,000
GBP
|
86,900,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
1,010,000,000
GBP
|
894,900,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Merger reserve |
351,700,000
GBP
|
351,700,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
2,251,700,000
GBP
|
2,332,000,000
GBP
|
— |
| Liabilities |
809,700,000
GBP
|
1,005,100,000
GBP
|
— |
| Assets (liabilities) |
1,442,000,000
GBP
|
1,326,900,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
408,100,000
GBP
|
316,900,000
GBP
|
— |
| Current liabilities |
270,300,000
GBP
|
278,300,000
GBP
|
— |
| Assets less current liabilities [abstract] |