Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-07-02 |
As at 2021-06-27 |
As at 2021-06-26 |
As at 2020-06-28 |
|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||
| Property, plant and equipment [abstract] | ||||
| Property, plant and equipment |
173,700,000.0
GBP
|
— |
162,600,000.0
GBP
|
— |
| Intangible assets and goodwill [abstract] | ||||
| Intangible assets and goodwill |
9,900,000.0
GBP
|
— |
14,800,000.0
GBP
|
— |
| Miscellaneous non-current assets [abstract] | ||||
| Non-current derivative financial assets |
4,600,000.0
GBP
|
— |
300,000.0
GBP
|
— |
| Trade and other receivables [abstract] | ||||
| Trade and other receivables |
22,900,000.0
GBP
|
— |
11,800,000.0
GBP
|
— |
| Cash and cash equivalents [abstract] | ||||
| Cash and cash equivalents |
30,200,000.0
GBP
|
128,600,000
GBP
|
128,600,000.0
GBP
|
90,000,000
GBP
|
| Miscellaneous current assets [abstract] | ||||
| Current derivative financial assets |
19,900,000.0
GBP
|
— |
400,000.0
GBP
|
— |
| Borrowings, by type [abstract] | ||||
| Loans received |
52,800,000.0
GBP
|
— |
—
GBP
|
— |
| Trade and other payables [abstract] | ||||
| Trade and other payables |
223,200,000.0
GBP
|
— |
181,800,000.0
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | ||||
| Non-current derivative financial liabilities |
—
GBP
|
— |
800,000.0
GBP
|
— |
| Miscellaneous current liabilities [abstract] | ||||
| Current derivative financial liabilities |
—
GBP
|
— |
5,100,000.0
GBP
|
— |
| Issued capital [abstract] | ||||
| Issued capital |
2,000,000.0
GBP
|
— |
2,000,000.0
GBP
|
— |
| Retained earnings [abstract] | ||||
| Retained earnings |
111,200,000.0
GBP
|
— |
238,700,000.0
GBP
|
— |
| Miscellaneous equity [abstract] | ||||
| Capital redemption reserve |
43,200,000.0
GBP
|
— |
43,200,000.0
GBP
|
— |
| Net assets (liabilities) [abstract] | ||||
| Assets |
737,900,000.0
GBP
|
— |
766,700,000.0
GBP
|
— |
| Liabilities |
559,600,000.0
GBP
|
— |
485,500,000.0
GBP
|
— |
| Assets (liabilities) |
178,300,000.0
GBP
|
— |
281,200,000.0
GBP
|
— |
| Net current assets (liabilities) [abstract] | ||||
| Current assets |
297,100,000.0
GBP
|
— |
315,600,000.0
GBP
|
— |
| Current liabilities |
276,000,000.0
GBP
|
— |
235,900,000.0
GBP
|
— |
| Assets less current liabilities [abstract] |