Statement Of Cash Flows [Abstract]
| Concept |
2022-01-01 to 2022-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Cash flows from (used in) operations before changes in working capital |
139,500,000
GBP
|
191,500,000
GBP
|
| Increase (decrease) in working capital |
64,500,000
GBP
|
52,700,000
GBP
|
| Adjustments for decrease (increase) in trade and other receivables |
24,400,000
GBP
|
94,000,000
GBP
|
| Adjustments for increase (decrease) in trade and other payables |
71,600,000
GBP
|
73,500,000
GBP
|
| Adjustments for amortisation expense |
2,000,000
GBP
|
1,500,000
GBP
|
| Adjustments for depreciation expense |
22,900,000
GBP
|
20,500,000
GBP
|
| Adjustments for gain (loss) on disposals, property, plant and equipment |
500,000
GBP
|
500,000
GBP
|
| Adjustments for undistributed profits of investments accounted for using equity method |
14,300,000
GBP
|
5,400,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||
| Dividends received from joint ventures, classified as investing activities |
1,400,000
GBP
|
–
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from exercise of options |
1,600,000
GBP
|
1,700,000
GBP
|
| Proceeds from issue of ordinary shares |
10,200,000
GBP
|
300,000
GBP
|