Statement Of Changes In Equity [Abstract]
| Concept |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||
| Equity |
97,546,000
GBP
|
— | — | — | — | — |
255,000
GBP
|
–
GBP
|
180,019,000
GBP
|
293,441,000
GBP
|
15,621,000
GBP
|
— | — |
237,082,000
GBP
|
255,000
GBP
|
— |
41,187,000
GBP
|
— |
180,019,000
GBP
|
— |
–
GBP
|
15,621,000
GBP
|
— | — |
207,727,000
GBP
|
–
GBP
|
15,621,000
GBP
|
551,000
GBP
|
180,019,000
GBP
|
11,536,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — |
56,359,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
29,685,000
GBP
|
— | — | — | — | — | — | — |
| Comprehensive income | — |
–
GBP
|
–
GBP
|
56,359,000
GBP
|
56,359,000
GBP
|
-
GBP
|
— | — | — | — | — |
–
GBP
|
-
GBP
|
— | — |
–
GBP
|
— |
–
GBP
|
— |
–
GBP
|
— | — |
29,685,000
GBP
|
29,685,000
GBP
|
— | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — |
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
— |
–
GBP
|
— |
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
— | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — |
34,000
GBP
|
— |
–
GBP
|
— |
–
GBP
|
— | — |
34,000
GBP
|
–
GBP
|
— | — | — | — | — | — |