Statement Of Financial Position [Abstract]
| Concept |
As at 2022-07-02 |
As at 2022-07-02 |
As at 2022-07-02 |
As at 2022-07-02 |
As at 2022-07-02 |
As at 2022-07-02 |
As at 2022-07-02 |
As at 2021-06-27 |
As at 2021-06-26 |
As at 2021-06-26 |
As at 2021-06-26 |
As at 2021-06-26 |
As at 2021-06-26 |
As at 2021-06-26 |
As at 2021-06-26 |
As at 2020-06-28 |
As at 2020-06-28 |
As at 2020-06-28 |
As at 2020-06-28 |
As at 2020-06-28 |
As at 2020-06-28 |
As at 2020-06-28 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||
| Property, plant and equipment |
173,700,000.0
GBP
|
— | — | — | — | — | — | — |
162,600,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
248,500,000.0
GBP
|
— | — | — | — | — | — | — |
262,000,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
4,100,000.0
GBP
|
— | — | — | — | — | — | — |
11,400,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets |
440,800,000.0
GBP
|
— | — | — | — | — | — | — |
451,100,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||
| Current tax assets, current |
1,100,000.0
GBP
|
— | — | — | — | — | — | — |
2,400,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
30,200,000.0
GBP
|
— | — | — | — | — | — |
128,600,000
GBP
|
128,600,000.0
GBP
|
— | — | — | — | — | — |
90,000,000
GBP
|
— | — | — | — | — | — |
| Current assets |
297,100,000.0
GBP
|
— | — | — | — | — | — | — |
315,600,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets |
737,900,000.0
GBP
|
— | — | — | — | — | — | — |
766,700,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||
| Issued capital |
2,000,000.0
GBP
|
— | — | — | — | — | — | — |
2,000,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
111,200,000.0
GBP
|
— | — | — | — | — | — | — |
238,700,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
1,700,000.0
GBP
|
— | — | — | — | — | — | — |
1,600,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
20,200,000.0
GBP
|
— | — | — | — | — | — | — |
4,300,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
178,300,000.0
GBP
|
— | — | — | — | — | — | — |
281,200,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity | — |
1,700,000.0
GBP
|
2,000,000.0
GBP
|
43,200,000.0
GBP
|
20,200,000.0
GBP
|
111,200,000.0
GBP
|
178,300,000.0
GBP
|
— | — |
281,200,000.0
GBP
|
238,700,000.0
GBP
|
1,600,000.0
GBP
|
2,000,000.0
GBP
|
4,300,000.0
GBP
|
43,200,000.0
GBP
|
— |
1,600,000.0
GBP
|
2,000,000.0
GBP
|
173,400,000.0
GBP
|
43,200,000.0
GBP
|
121,300,000.0
GBP
|
5,300,000.0
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||
| Non-current liabilities |
283,600,000.0
GBP
|
— | — | — | — | — | — | — |
249,600,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||
| Current tax liabilities, current |
52,800,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities |
276,000,000.0
GBP
|
— | — | — | — | — | — | — |
235,900,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
559,600,000.0
GBP
|
— | — | — | — | — | — | — |
485,500,000.0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |