Statement Of Cash Flows [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) investing activities [abstract] | ||
| Dividends received from investments accounted for using equity method, classified as investing activities |
21,100,000
GBP
|
9,100,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Dividends paid to equity holders of parent, classified as financing activities |
33,700,000
GBP
|
30,300,000
GBP
|
| Dividends paid to non-controlling interests, classified as financing activities |
1,700,000
GBP
|
—
GBP
|
| Proceeds from exercise of options |
—
GBP
|
100,000
GBP
|