Statement Of Financial Position [Abstract]
| Concept |
As at 2025-03-29 |
As at 2025-03-29 |
As at 2025-03-29 |
As at 2025-03-29 |
As at 2025-03-29 |
As at 2025-03-29 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2024-03-30 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
As at 2023-04-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||
| Property, plant and equipment | — |
204,300,000
GBP
|
— | — | — | — | — | — | — | — |
190,400,000
GBP
|
— | — | — | — | — | — | — |
| Goodwill | — |
702,700,000
GBP
|
— | — | — | — | — | — | — | — |
702,700,000
GBP
|
— | — | — | — | — | — | — |
| Intangible assets other than goodwill | — |
271,200,000
GBP
|
— | — | — | — | — | — | — | — |
289,600,000
GBP
|
— | — | — | — | — | — | — |
| Deferred tax assets | — |
16,700,000
GBP
|
— | — | — | — | — | — | — | — |
22,400,000
GBP
|
— | — | — | — | — | — | — |
| Non-current assets | — |
1,843,600,000
GBP
|
— | — | — | — | — | — | — | — |
2,015,100,000
GBP
|
— | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||
| Current inventories | — |
101,500,000
GBP
|
— | — | — | — | — | — | — | — |
98,900,000
GBP
|
— | — | — | — | — | — | — |
| Trade and other current receivables | — |
115,000,000
GBP
|
— | — | — | — | — | — | — | — |
115,700,000
GBP
|
— | — | — | — | — | — | — |
| Cash and cash equivalents | — |
191,500,000
GBP
|
— | — | — | — | — | — | — | — |
102,300,000
GBP
|
— | — |
63,400,000
GBP
|
— | — | — | — |
| Current assets | — |
408,100,000
GBP
|
— | — | — | — | — | — | — | — |
316,900,000
GBP
|
— | — | — | — | — | — | — |
| Assets | — |
2,251,700,000
GBP
|
— | — | — | — | — | — | — | — |
2,332,000,000
GBP
|
— | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital | — |
86,900,000
GBP
|
— | — | — | — | — | — | — | — |
86,900,000
GBP
|
— | — | — | — | — | — | — |
| Retained earnings | — |
1,010,000,000
GBP
|
— | — | — | — | — | — | — | — |
894,900,000
GBP
|
— | — | — | — | — | — | — |
| Share premium | — |
2,700,000
GBP
|
— | — | — | — | — | — | — | — |
2,700,000
GBP
|
— | — | — | — | — | — | — |
| Equity |
86,900,000
GBP
|
1,442,000,000
GBP
|
351,700,000
GBP
|
9,300,000
GBP
|
1,010,000,000
GBP
|
2,700,000
GBP
|
86,900,000
GBP
|
351,700,000
GBP
|
894,900,000
GBP
|
2,700,000
GBP
|
1,326,900,000
GBP
|
9,300,000
GBP
|
86,800,000
GBP
|
1,406,000,000
GBP
|
974,300,000
GBP
|
2,500,000
GBP
|
351,700,000
GBP
|
9,300,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||
| Non-current provisions [abstract] | ||||||||||||||||||
| Non-current provisions | — |
7,300,000
GBP
|
— | — | — | — | — | — | — | — |
7,300,000
GBP
|
— | — | — | — | — | — | — |
| Deferred tax liabilities | — |
178,300,000
GBP
|
— | — | — | — | — | — | — | — |
152,900,000
GBP
|
— | — | — | — | — | — | — |
| Non-current liabilities | — |
539,400,000
GBP
|
— | — | — | — | — | — | — | — |
726,800,000
GBP
|
— | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||
| Current provisions | — |
6,700,000
GBP
|
— | — | — | — | — | — | — | — |
9,800,000
GBP
|
— | — | — | — | — | — | — |
| Trade and other current payables | — |
260,100,000
GBP
|
— | — | — | — | — | — | — | — |
264,600,000
GBP
|
— | — | — | — | — | — | — |
| Current tax liabilities, current | — |
–
GBP
|
— | — | — | — | — | — | — | — |
400,000
GBP
|
— | — | — | — | — | — | — |
| Current liabilities | — |
270,300,000
GBP
|
— | — | — | — | — | — | — | — |
278,300,000
GBP
|
— | — | — | — | — | — | — |
| Liabilities | — |
809,700,000
GBP
|
— | — | — | — | — | — | — | — |
1,005,100,000
GBP
|
— | — | — | — | — | — | — |