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 associates, classified as investing activities |
—
GBP
|
400,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from exercise of options |
400,000
GBP
|
200,000
GBP
|
| Proceeds from issue of bonds, notes and debentures |
—
GBP
|
18 6. 5
GBP
|
| Repayments of bonds, notes and debentures |
16 0. 6
GBP
|
2 26 .1
GBP
|