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) investing activities [abstract] | ||
| Dividends received from investments accounted for using equity method, classified as investing activities |
1,000,000
GBP
|
1,000,000
GBP
|
| Purchase of interests in investments accounted for using equity method |
—
GBP
|
3,000,000
GBP
|
| Proceeds from sales of investments accounted for using equity method |
—
GBP
|
2,000,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Dividends paid to equity holders of parent, classified as financing activities |
147,000,000
GBP
|
128,000,000
GBP
|
| Dividends paid to non-controlling interests, classified as financing activities |
17,000,000
GBP
|
6,000,000
GBP
|
| Cash repayments of advances and loans from related parties |
—
GBP
|
267,000,000
GBP
|
| Proceeds from issue of bonds, notes and debentures |
—
GBP
|
348,000,000
GBP
|
| Repayments of bonds, notes and debentures |
70,000,000
GBP
|
—
GBP
|