Statement Of Cash Flows [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|
| 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 |
15,000,000
GBP
|
13,000,000
GBP
|
| Purchase of interests in investments accounted for using equity method |
1,000,000
GBP
|
3,000,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Dividends paid to equity holders of parent, classified as financing activities |
4 7
GBP
|
94,000,000
GBP
|
| Dividends paid to non-controlling interests, classified as financing activities |
2,000,000
GBP
|
1,000,000
GBP
|
| Cash flows from (used in) increase (decrease) in current borrowings |
27,000,000
GBP
|
28,000,000
GBP
|
| Proceeds from issue of bonds, notes and debentures |
249,000,000
GBP
|
–
GBP
|
| Repayments of bonds, notes and debentures |
200,000,000
GBP
|
–
GBP
|
| Payments for share issue costs |
6,000,000
GBP
|
–
GBP
|
| Payments for debt issue costs |
2,000,000
GBP
|
–
GBP
|