Statement Of Cash Flows [Abstract]
| Concept |
2021-12-27 to 2022-12-25 |
2021-12-27 to 2022-12-25 |
2021-12-27 to 2022-12-25 |
2021-12-27 to 2022-12-25 |
2021-12-27 to 2022-12-25 |
2021-12-27 to 2022-12-25 |
2021-12-27 to 2022-12-25 |
2021-12-27 to 2022-12-25 |
2021-12-27 to 2022-12-25 |
As at 2022-12-25 |
2020-12-28 to 2021-12-26 |
As at 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
2020-12-28 to 2021-12-26 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||||||||||
| Profit (loss) |
8 1.6
GBP
|
—
GBP
|
—
GBP
|
81,600,000
GBP
|
8 1.6
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
— |
78,300,000
GBP
|
— |
78,300,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
15. 1
GBP
|
9 3 .4
GBP
|
—
GBP
|
—
GBP
|
| Adjustments to reconcile profit (loss) [abstract] | ||||||||||||||||||||
| Adjustments for decrease (increase) in inventories | — | — | — | — |
600,000
GBP
|
— | — | — | — | — |
0. 3
GBP
|
— | — | — | — | — | — | — | — | — |
| Adjustments for depreciation and amortisation expense | — | — | — | — |
1 8 .7
GBP
|
— | — | — | — | — |
1 7. 4
GBP
|
— | — | — | — | — | — | — | — | — |
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss | — | — | — | — |
1,600,000
GBP
|
— | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Adjustments for provisions | — | — | — | — |
300,000
GBP
|
— | — | — | — | — |
1 .0
GBP
|
— | — | — | — | — | — | — | — | — |
| Adjustments for fair value losses (gains) | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — |
1,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) operations | — | — | — | — |
103,800,000
GBP
|
— | — | — | — | — |
131,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) operating activities | — | — | — | — |
8 5 .1
GBP
|
— | — | — | — | — |
113,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) investing activities [abstract] | ||||||||||||||||||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — | — | — | — |
3,700,000
GBP
|
— | — | — | — | — |
1 0. 2
GBP
|
— | — | — | — | — | — | — | — | — |
| Other cash receipts from sales of interests in joint ventures, classified as investing activities | — | — | — | — |
3. 3
GBP
|
— | — | — | — | — |
2 .4
GBP
|
— | — | — | — | — | — | — | — | — |
| Purchase of property, plant and equipment, classified as investing activities | — | — | — | — |
1 0. 5
GBP
|
— | — | — | — | — |
5,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Purchase of intangible assets, classified as investing activities | — | — | — | — |
9 .2
GBP
|
— | — | — | — | — |
8,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Interest received, classified as investing activities | — | — | — | — |
0 .1
GBP
|
— | — | — | — | — |
0. 3
GBP
|
— | — | — | — | — | — | — | — | — |
| Other inflows (outflows) of cash, classified as investing activities | — | — | — | — |
6,800,000
GBP
|
— | — | — | — | — |
8 .7
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) investing activities | — | — | — | — |
29 .5
GBP
|
— | — | — | — | — |
32,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) financing activities [abstract] | ||||||||||||||||||||
| Payments to acquire or redeem entity's shares | — | — | — | — |
86,500,000
GBP
|
— | — | — | — | — |
83,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Proceeds from borrowings, classified as financing activities | — | — | — | — |
365,800,000
GBP
|
— | — | — | — | — |
150 .0
GBP
|
— | — | — | — | — | — | — | — | — |
| Repayments of borrowings, classified as financing activities | — | — | — | — |
3 23 .4
GBP
|
— | — | — | — | — |
147 .3
GBP
|
— | — | — | — | — | — | — | — | — |
| Payments of lease liabilities, classified as financing activities | — | — | — | — |
3 3.0
GBP
|
— | — | — | — | — |
34. 1
GBP
|
— | — | — | — | — | — | — | — | — |
| Dividends paid, classified as financing activities | — | — | — | — |
43 . 8
GBP
|
— | — | — | — | — |
56,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Interest paid, classified as financing activities | — | — | — | — |
4 .9
GBP
|
— | — | — | — | — |
4,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) financing activities | — | — | — | — |
127 .4
GBP
|
— | — | — | — | — |
17 4.7
GBP
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — | — | — |
12 .8
GBP
|
— | — | — | — | — |
28,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — | — | — |
400,000
GBP
|
— | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — | — | — | — | — | — |
3 0.4
GBP
|
— |
42,800,000
GBP
|
— | — | — | — | — | — | — | — |