Statement Of Cash Flows [Abstract]
| Concept |
2021-06-27 to 2022-07-02 |
2020-06-28 to 2021-06-26 |
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Adjustments for finance income (cost) |
4,900,000.0
GBP
|
8,600,000.0
GBP
|
| Cash flows from (used in) operations before changes in working capital |
301,800,000.0
GBP
|
254,700,000.0
GBP
|
| Increase (decrease) in working capital |
14,800,000.0
GBP
|
35,000,000.0
GBP
|
| Adjustments for decrease (increase) in trade and other receivables |
7,700,000.0
GBP
|
4,100,000.0
GBP
|
| Adjustments for increase (decrease) in trade and other payables |
33,200,000.0
GBP
|
15,100,000.0
GBP
|
| Adjustments for depreciation expense |
48,600,000.0
GBP
|
45,700,000.0
GBP
|
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss, property, plant and equipment |
300,000.0
GBP
|
2,300,000.0
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from sale or issue of treasury shares |
3,900,000.0
GBP
|
1,800,000.0
GBP
|