Statement Of Cash Flows [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
2023-01-01 to 2023-12-31 |
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Cash flows from (used in) operations before changes in working capital |
206,500,000
GBP
|
178,000,000
GBP
|
| Increase (decrease) in working capital |
33,800,000
GBP
|
43,200,000
GBP
|
| Adjustments for decrease (increase) in trade and other receivables |
7,800,000
GBP
|
107,800,000
GBP
|
| Adjustments for increase (decrease) in trade and other payables |
29,100,000
GBP
|
116,200,000
GBP
|
| Adjustments for decrease (increase) in accrued income including contract assets [abstract] | ||
| Adjustments for decrease (increase) in contract assets |
46,000,000
GBP
|
24,000,000
GBP
|
| Adjustments for increase (decrease) in deferred income including contract liabilities [abstract] | ||
| Adjustments for increase (decrease) in contract liabilities |
14,600,000
GBP
|
21,600,000
GBP
|
| Adjustments for increase (decrease) in employee benefit liabilities |
–
GBP
|
200,000
GBP
|
| Adjustments for amortisation expense |
500,000
GBP
|
2,900,000
GBP
|
| Adjustments for depreciation expense |
33,100,000
GBP
|
26,800,000
GBP
|
| Adjustments for gain (loss) on disposals, property, plant and equipment |
700,000
GBP
|
100,000
GBP
|
| Adjustments for undistributed profits of investments accounted for using equity method |
4,600,000
GBP
|
14,100,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||
| Dividends received from joint ventures, classified as investing activities |
4,200,000
GBP
|
1,600,000
GBP
|
| Cash advances and loans made to related parties |
29,100,000
GBP
|
44,200,000
GBP
|
| Cash receipts from repayment of advances and loans made to related parties |
27,900,000
GBP
|
34,200,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from exercise of options |
19,500,000
GBP
|
4,000,000
GBP
|
| Proceeds from issue of ordinary shares |
9,700,000
GBP
|
100,000
GBP
|