Statement Of Cash Flows [Abstract]
| Concept |
2023-12-31 to 2024-12-28 |
2023-01-01 to 2023-12-30 |
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Adjustments for finance income |
8,100,000
GBP
|
6,100,000
GBP
|
| Adjustments for decrease (increase) in trade and other receivables |
8,100,000
GBP
|
3,600,000
GBP
|
| Adjustments for increase (decrease) in trade and other payables |
24,900,000
GBP
|
18. 0
GBP
|
| Adjustments for increase (decrease) in employee benefit liabilities |
4,500,000
GBP
|
–
GBP
|
| Adjustments for amortisation expense |
4,200,000
GBP
|
3,900,000
GBP
|
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss, property, plant and equipment |
2,900,000
GBP
|
1,400,000
GBP
|
| Adjustments for gain (loss) on disposals, property, plant and equipment |
11,800,000
GBP
|
2 .0
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from sale or issue of treasury shares |
4,700,000
GBP
|
1,600,000
GBP
|