Statement Of Financial Position [Abstract]
| Concept |
As at 2025-03-27 |
As at 2025-03-27 |
As at 2025-03-27 |
As at 2025-03-27 |
As at 2025-03-27 |
As at 2025-03-27 |
As at 2025-03-27 |
As at 2025-03-27 |
As at 2024-03-28 |
As at 2024-03-28 |
As at 2024-03-28 |
As at 2024-03-28 |
As at 2024-03-28 |
As at 2024-03-28 |
As at 2024-03-28 |
As at 2024-03-28 |
As at 2023-03-30 |
As at 2023-03-30 |
As at 2023-03-30 |
As at 2023-03-30 |
As at 2023-03-30 |
As at 2023-03-30 |
As at 2023-03-30 |
As at 2023-03-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||
| Property, plant and equipment | — | — | — | — | — | — | — |
1 61 . 7
GBP
|
1 58 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — | — | — | — | — |
284 .6
GBP
|
3 1 9. 3
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other non-current financial assets | — | — | — | — | — | — | — |
15 .0
GBP
|
10 .9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets | — | — | — | — | — | — | — |
1,44 6.4
GBP
|
1,468,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||
| Current inventories | — | — | — | — | — | — | — |
10 6 .9
GBP
|
9 7. 5
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current receivables | — | — | — | — | — | — | — |
63,300,000
GBP
|
6 0 .9
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — | — | — | — |
3 9. 5
GBP
|
5 7. 1
GBP
|
— | — | — | — | — | — | — | — | — | — |
178 .0
GBP
|
— | — | — | — |
| Current assets | — | — | — | — | — | — | — |
210. 4
GBP
|
215,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — | — | — | — | — |
1,656,800,000
GBP
|
1,683 .8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||
| Issued capital | — | — | — | — | — | — | — |
4,600,000
GBP
|
4,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — | — | — | — |
1, 248. 2
GBP
|
1,24 2.8
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
1, 248. 2
GBP
|
0. 4
GBP
|
4,600,000
GBP
|
113. 3
GBP
|
37 2 .0
GBP
|
0 .1
GBP
|
1 . 2
GBP
|
993. 2
GBP
|
98 8. 5
GBP
|
0. 5
GBP
|
113. 3
GBP
|
0. 3
GBP
|
100,000
GBP
|
372 .0
GBP
|
4,700,000
GBP
|
1 ,242 .8
GBP
|
4,800,000
GBP
|
113 . 3
GBP
|
37 2 .0
GBP
|
1 ,02 5.1
GBP
|
100,000
GBP
|
1 . 6
GBP
|
1, 280.5
GBP
|
200,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||
| Non-current provisions [abstract] | ||||||||||||||||||||||||
| Non-current provisions | — | — | — | — | — | — | — |
3 .9
GBP
|
5 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities | — | — | — | — | — | — | — |
1 7. 6
GBP
|
4 .7
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities | — | — | — | — | — | — | — |
31 8 .0
GBP
|
35 4 .1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||||||||
| Current provisions | — | — | — | — | — | — | — |
5 .1
GBP
|
7 .6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current payables | — | — | — | — | — | — | — |
255,600,000
GBP
|
24 9. 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities | — | — | — | — | — | — | — |
345,600,000
GBP
|
3 41 . 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — | — | — | — |
66 3 . 6
GBP
|
695,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |