Disclosure Of Effect Of Changes In Foreign Exchange Rates [Text Block]
| Concept |
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 |
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 |
2021-01-01 to 2021-12-31 |
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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of effect of changes in foreign exchange rates [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of information when currency is not exchangeable into another currency [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of information when foreign operation’s functional currency is not exchangeable into presentation currency [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of summarised financial information about foreign operation [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of summarised financial information about foreign operation [abstract] | |||||||||||||||||||
| Disclosure of summarised financial information about foreign operation [line items] | |||||||||||||||||||
| Non-current assets | — | — | — |
290,300,000
GBP
|
— | — | — | — | — | — | — | — |
290. 1
GBP
|
— | — | — | — | — | — |
| Current assets | — | — | — |
391,800,000
GBP
|
— | — | — | — | — | — | — | — |
282,600,000
GBP
|
— | — | — | — | — | — |
| Non-current liabilities | — | — | — |
63,200,000
GBP
|
— | — | — | — | — | — | — | — |
66,900,000
GBP
|
— | — | — | — | — | — |
| Current liabilities | — | — | — |
257 .3
GBP
|
— | — | — | — | — | — | — | — |
177 .4
GBP
|
— | — | — | — | — | — |
| Revenue | — | — | — | — |
–
GBP
|
— |
443,300,000
GBP
|
443,300,000
GBP
|
— |
358,200,000
GBP
|
— | — | — | — | — | — |
–
GBP
|
358,200,000
GBP
|
–
GBP
|
| Profit (loss) |
4,300,000
GBP
|
–
GBP
|
50 .1
GBP
|
— |
300,000
GBP
|
–
GBP
|
54,700,000
GBP
|
54,400,000
GBP
|
5 0 .1
GBP
|
25,800,000
GBP
|
28,900,000
GBP
|
–
GBP
|
— |
–
GBP
|
3 .1
GBP
|
28,900,000
GBP
|
60,600,000
GBP
|
35,200,000
GBP
|
0 .4
GBP
|
| Other comprehensive income |
–
GBP
|
2. 7
GBP
|
2,800,000
GBP
|
— | — |
–
GBP
|
— |
2,800,000
GBP
|
5,500,000
GBP
|
900,000
GBP
|
1. 1
GBP
|
0. 2
GBP
|
— |
–
GBP
|
–
GBP
|
900,000
GBP
|
— | — | — |
| Comprehensive income |
4,300,000
GBP
|
2. 7
GBP
|
52,900,000
GBP
|
— | — |
–
GBP
|
— |
5 7. 2
GBP
|
55,600,000
GBP
|
26,700,000
GBP
|
30,000,000
GBP
|
0. 2
GBP
|
— |
–
GBP
|
3 .1
GBP
|
29,800,000
GBP
|
— | — | — |