Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-12-31 |
As at 2022-12-25 |
As at 2021-12-26 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
97,600,000
GBP
|
96,500,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
28,800,000
GBP
|
30,000,000
GBP
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments accounted for using equity method |
25,200,000
GBP
|
25,400,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
3,700,000
GBP
|
3,400,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current finance lease receivables |
192,900,000
GBP
|
185,600,000
GBP
|
— |
| Non-current investments other than investments accounted for using equity method |
10,300,000
GBP
|
11,300,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
51,600,000
GBP
|
55,900,000
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
11,400,000
GBP
|
11,600,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
52,100,000
GBP
|
30,400,000
GBP
|
42,800,000
GBP
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | |||
| Non-current assets or disposal groups classified as held for sale |
–
GBP
|
32,900,000
GBP
|
— |
| Miscellaneous current assets [abstract] | |||
| Current finance lease receivables |
15,800,000
GBP
|
14,400,000
GBP
|
— |
| Trade and other non-current payables [abstract] | |||
| Trade and other non-current payables |
200,000
GBP
|
200,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
111,400,000
GBP
|
98,600,000
GBP
|
— |
| Categories of non-current financial liabilities [abstract] | |||
| Non-current financial liabilities |
284,900,000
GBP
|
283,700,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
2,100,000
GBP
|
2,200,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
171,100,000
GBP
|
156,600,000
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
2,600,000
GBP
|
500,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
500,000
GBP
|
500,000
GBP
|
— |
| Capital reserve |
12,500,000
GBP
|
9,000,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
512,500,000
GBP
|
520,700,000
GBP
|
— |
| Liabilities |
646,500,000
GBP
|
633,500,000
GBP
|
— |
| Assets (liabilities) |
134,000,000
GBP
|
112,800,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
134,700,000
GBP
|
147,200,000
GBP
|
— |
| Current liabilities |
143,400,000
GBP
|
128,500,000
GBP
|
— |
| Assets less current liabilities [abstract] |