Statement Of Cash Flows [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-01-01 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-01-01 |
|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||
| Cash flows from (used in) operating activities [abstract] | ||||||
| Dividends received, classified as operating activities |
35,200,000
GBP
|
— | — |
1 9.6
GBP
|
— | — |
| Interest received, classified as operating activities |
18,100,000
GBP
|
— | — |
7,500,000
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities |
37 .1
GBP
|
— | — |
10,500,000
GBP
|
— | — |
| Cash flows from (used in) operating activities |
3 8 . 6
GBP
|
— | — |
3 4 . 9
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | ||||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities |
–
GBP
|
— | — |
30,300,000
GBP
|
— | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities |
800,000
GBP
|
— | — |
800,000
GBP
|
— | — |
| Cash flows from (used in) investing activities |
5 . 0
GBP
|
— | — |
2 9. 5
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | ||||||
| Proceeds from issuing shares |
–
GBP
|
— | — |
200,000
GBP
|
— | — |
| Repayments of borrowings, classified as financing activities |
2,600,000
GBP
|
— | — |
3,900,000
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities |
300,000
GBP
|
— | — |
600,000
GBP
|
— | — |
| Dividends paid, classified as financing activities |
36 .5
GBP
|
— | — |
35,400,000
GBP
|
— | — |
| Interest paid, classified as financing activities |
10. 3
GBP
|
— | — |
1 0.1
GBP
|
— | — |
| Cash flows from (used in) financing activities |
49,700,000
GBP
|
— | — |
49 . 8
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
6 .1
GBP
|
— | — |
55 . 2
GBP
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||
| Effect of exchange rate changes on cash and cash equivalents |
2 .6
GBP
|
— | — |
3,600,000
GBP
|
— | — |
| Cash and cash equivalents | — |
138,000,000
GBP
|
145,900,000
GBP
|
— |
146,000,000
GBP
|
204,600,000
GBP
|