Statement Of Changes In Equity [Abstract]
| Concept |
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 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 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 |
As at 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 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||||||
| Equity | — |
18,019,000
GBP
|
707,000
GBP
|
— | — |
17 ,835
GBP
|
— | — | — | — |
17 ,512
GBP
|
258,000
GBP
|
— |
2,540,000
GBP
|
1,068,000
GBP
|
323,000
GBP
|
— | — | — |
16,528,000
GBP
|
116,000
GBP
|
16,073,000
GBP
|
1,068,000
GBP
|
— |
2,488,000
GBP
|
707,000
GBP
|
258,000
GBP
|
— | — | — | — |
16,189,000
GBP
|
— | — | — | — |
19,932,000
GBP
|
625,000
GBP
|
707,000
GBP
|
2,090,000
GBP
|
258,000
GBP
|
20,557,000
GBP
|
19,989,000
GBP
|
1,068,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
215,000
GBP
|
— | — |
-
GBP
|
1,491,000
GBP
|
— |
-
GBP
|
600,000
GBP
|
1, 106
GBP
|
-
GBP
|
— | — |
-
GBP
|
— | — | — |
1,7 06
GBP
|
1,491,000
GBP
|
3, 7 94
GBP
|
— | — | — | — |
3,354,000
GBP
|
— | — | — |
-
GBP
|
2,656,000
GBP
|
1, 138
GBP
|
-
GBP
|
— |
-
GBP
|
440,000
GBP
|
-
GBP
|
3,354,000
GBP
|
— | — | — | — | — | — | — | — |
| Other comprehensive income |
8,000
GBP
|
— | — |
-
GBP
|
52,000
GBP
|
— |
-
GBP
|
— | — |
52,000
GBP
|
— | — |
-
GBP
|
— | — | — |
60,000
GBP
|
-
GBP
|
46 7
GBP
|
— | — | — | — |
-
GBP
|
— | — | — |
-
GBP
|
— | — |
-
GBP
|
— |
398,000
GBP
|
69,000
GBP
|
-
GBP
|
398,000
GBP
|
— | — | — | — | — | — | — | — |
| Comprehensive income |
2 07
GBP
|
— | — |
-
GBP
|
1,439,000
GBP
|
— |
-
GBP
|
— | — |
52,000
GBP
|
— | — |
-
GBP
|
— | — | — |
1,646,000
GBP
|
1,491,000
GBP
|
4,261,000
GBP
|
— | — | — | — |
3,354,000
GBP
|
— | — | — |
-
GBP
|
— | — |
-
GBP
|
— |
398,000
GBP
|
509,000
GBP
|
-
GBP
|
3, 7 52
GBP
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
-
GBP
|
— | — |
-
GBP
|
-
GBP
|
— |
-
GBP
|
— | — |
-
GBP
|
— | — |
-
GBP
|
— | — | — |
-
GBP
|
-
GBP
|
107,000
GBP
|
— | — | — | — |
10 7
GBP
|
— | — | — |
-
GBP
|
— | — |
-
GBP
|
— |
-
GBP
|
-
GBP
|
-
GBP
|
10 7
GBP
|
— | — | — | — | — | — | — | — |