Statement Of Cash Flows [Abstract]
| Concept |
2022-01-01 to 2022-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Increase (decrease) in working capital |
2,600,000
GBP
|
4,300,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||
| Dividends received from associates, classified as investing activities |
2,600,000
GBP
|
2,100,000
GBP
|
| Proceeds from sales of interests in associates |
–
GBP
|
21,200,000
GBP
|
| Cash advances and loans made to related parties |
4,000,000
GBP
|
14,000,000
GBP
|
| Proceeds from sales of investment property |
124,000,000
GBP
|
7,000,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from sale or issue of treasury shares |
100,000
GBP
|
100,000
GBP
|
| Payments for share issue costs |
500,000
GBP
|
2,500,000
GBP
|