Analysis Of Income And Expense [Abstract]
| Concept |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||
| Revenue [abstract] | ||||||||||
| Revenue | — | — |
93,300,000
GBP
|
— | — | — | — | — |
83,200,000
GBP
|
— |
| Material income and expense [abstract] | ||||||||||
| Finance income (cost) | — | — |
600,000
GBP
|
— | — | — | — | — |
800,000
GBP
|
— |
| Selling, general and administrative expense [abstract] | ||||||||||
| Selling, general and administrative expense | — | — |
31. 0
GBP
|
— | — | — | — | — |
30 .0
GBP
|
— |
| Miscellaneous other comprehensive income [abstract] | ||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations | — | — |
400,000
GBP
|
— | — | — | — | — |
0 .1
GBP
|
— |
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||
| Share of profit (loss) of joint ventures accounted for using equity method | — | — |
0 .1
GBP
|
— | — | — | — | — |
0 .1
GBP
|
— |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||
| Comprehensive income |
–
GBP
|
–
GBP
|
24,900,000
GBP
|
24,500,000
GBP
|
400,000
GBP
|
–
GBP
|
–
GBP
|
0 .1
GBP
|
19,100,000
GBP
|
19,200,000
GBP
|