Analysis Of Income And Expense [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||||
| Revenue | — | — | — | — | — | — | — |
561,300,000
GBP
|
— |
561,300,000
GBP
|
–
GBP
|
586,500,000
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
586,500,000
GBP
|
— |
| Expenses by nature [abstract] | ||||||||||||||||||||||
| Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract] | ||||||||||||||||||||||
| Depreciation and amortisation expense [abstract] | ||||||||||||||||||||||
| Amortisation expense | — | — | — | — | — | — | — |
15,100,000
GBP
|
— |
700,000
GBP
|
14,400,000
GBP
|
15,600,000
GBP
|
— | — | — | — | — | — | — |
14,800,000
GBP
|
800,000
GBP
|
— |
| Disclosure of attribution of expenses by nature to their function [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of attribution of expenses by nature to their function [abstract] | ||||||||||||||||||||||
| Disclosure of attribution of expenses by nature to their function [line items] | ||||||||||||||||||||||
| 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 | — | — | — | — | — | — | — |
100,000
GBP
|
— | — | — |
100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||||
| Comprehensive income |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
100,000
GBP
|
33,500,000
GBP
|
33,200,000
GBP
|
100,000
GBP
|
— | — |
38,500,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
38,500,000
GBP
|
–
GBP
|
100,000
GBP
|
–
GBP
|
— | — |
100,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — | — |
33,200,000
GBP
|
— | — | — |
38,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — |