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) operating activities [abstract] | ||
| Adjustments for decrease (increase) in trade and other receivables |
3,400,000
GBP
|
4,600,000
GBP
|
| Adjustments for increase (decrease) in trade and other payables |
1 3.0
GBP
|
5,100,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from sale or issue of treasury shares |
1,200,000
GBP
|
900,000
GBP
|
| Payments for share issue costs |
–
GBP
|
2,000,000
GBP
|