Statement Of Financial Position [Abstract]
| Concept |
As at 2023-06-25 |
As at 2023-06-25 |
As at 2023-06-25 |
As at 2023-06-25 |
As at 2023-06-25 |
As at 2023-06-25 |
As at 2023-06-25 |
As at 2023-06-25 |
As at 2023-06-25 |
As at 2022-06-26 |
As at 2022-06-26 |
As at 2022-06-26 |
As at 2022-06-26 |
As at 2022-06-26 |
As at 2022-06-26 |
As at 2022-06-26 |
As at 2022-06-26 |
As at 2022-06-26 |
As at 2021-06-27 |
As at 2021-06-27 |
As at 2021-06-27 |
As at 2021-06-27 |
As at 2021-06-27 |
As at 2021-06-27 |
As at 2021-06-27 |
As at 2021-06-27 |
As at 2021-06-27 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||||||||
| Property, plant and equipment | — | — | — | — | — | — |
97,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
105,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — | — | — | — |
312,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
338,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Current tax assets | — | — | — | — | — | — |
2,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
7,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — | — | — | — |
15,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
10,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — | — | — |
26,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
17,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — | — | — | — |
1,059,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,119,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||||||||
| Issued capital | — | — | — | — | — | — |
24,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
25,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — | — | — |
184,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
179,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Share premium | — | — | — | — | — | — |
40,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
40,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Treasury shares | — | — | — | — | — | — |
10,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
4,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity |
6,600,000
GBP
|
10,100,000
GBP
|
184,000,000
GBP
|
4,900,000
GBP
|
359,600,000
GBP
|
24,100,000
GBP
|
237,100,000
GBP
|
18,600,000
GBP
|
40,400,000
GBP
|
4,900,000
GBP
|
357,800,000
GBP
|
17,500,000
GBP
|
6,900,000
GBP
|
25,900,000
GBP
|
18,600,000
GBP
|
40,400,000
GBP
|
268,900,000
GBP
|
179,500,000
GBP
|
40,400,000
GBP
|
25,900,000
GBP
|
8,000,000
GBP
|
357,800,000
GBP
|
149,300,000
GBP
|
200,000
GBP
|
700,000
GBP
|
18,600,000
GBP
|
284,500,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||||||||
| Liabilities | — | — | — | — | — | — |
822,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
851,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |