Statement Of Financial Position [Abstract]
| Concept |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-25 |
As at 2022-12-25 |
As at 2022-12-25 |
As at 2022-12-25 |
As at 2022-12-25 |
As at 2022-12-25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||
| Property, plant and equipment | — | — | — |
104,200,000
GBP
|
— | — | — | — | — |
113,600,000
GBP
|
— | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — |
9,900,000
GBP
|
— | — | — | — | — |
13,000,000
GBP
|
— | — | — | — | — | — | — | — |
| Goodwill | — | — | — |
35,900,000
GBP
|
— | — | — | — | — |
35,900,000
GBP
|
— | — | — | — | — | — | — | — |
| Current tax assets | — | — | — |
6,600,000
GBP
|
— | — | — | — | — |
8,100,000
GBP
|
— | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — |
20,800,000
GBP
|
— | — | — | — | — |
19,900,000
GBP
|
— | — | — | — |
40,400,000
GBP
|
— | — | — |
| Assets | — | — | — |
1,209,500,000
GBP
|
— | — | — | — | — |
1,219,300,000
GBP
|
— | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital | — | — | — |
32,200,000
GBP
|
— | — | — | — | — |
32,200,000
GBP
|
— | — | — | — | — | — | — | — |
| Retained earnings | — | — | — |
624,600,000
GBP
|
— | — | — | — | — |
583,200,000
GBP
|
— | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — |
678,600,000
GBP
|
— | — | — | — | — |
637,200,000
GBP
|
— | — | — | — | — | — | — | — |
| Equity |
4,400,000
GBP
|
624,600,000
GBP
|
-
GBP
|
678,600,000
GBP
|
17,400,000
GBP
|
32,200,000
GBP
|
–
GBP
|
32,200,000
GBP
|
583,200,000
GBP
|
637,200,000
GBP
|
17,400,000
GBP
|
4,400,000
GBP
|
605,400,000
GBP
|
4,400,000
GBP
|
637,500,000
GBP
|
21,900,000
GBP
|
32,200,000
GBP
|
17,400,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||
| Deferred tax liabilities | — | — | — |
210,300,000
GBP
|
— | — | — | — | — |
200,100,000
GBP
|
— | — | — | — | — | — | — | — |
| Liabilities | — | — | — |
530,900,000
GBP
|
— | — | — | — | — |
582,100,000
GBP
|
— | — | — | — | — | — | — | — |