Statement Of Comprehensive Income [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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||
| Profit (loss) |
1,100,000
GBP
|
–
GBP
|
159,600,000
GBP
|
–
GBP
|
40,600,000
GBP
|
200,200,000
GBP
|
–
GBP
|
158,500,000
GBP
|
–
GBP
|
172,100,000
GBP
|
1,100,000
GBP
|
235,100,000
GBP
|
6 3.0
GBP
|
171,000,000
GBP
|
–
GBP
|
–
GBP
|
| Other comprehensive income [abstract] | ||||||||||||||||
| Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||
| Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans | — | — |
15,500,000
GBP
|
— | — | — | — | — | — |
2 3.3
GBP
|
— | — | — | — | — | — |
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||
| Exchange differences on translation [abstract] | ||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations | — | — |
90,300,000
GBP
|
— | — | — | — | — | — |
58,400,000
GBP
|
— | — | — | — | — | — |
| Cash flow hedges [abstract] | ||||||||||||||||
| Other comprehensive income, before tax, cash flow hedges | — | — |
–
GBP
|
— | — | — | — | — | — |
19,300,000
GBP
|
— | — | — | — | — | — |
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss | — | — |
3,900,000
GBP
|
— | — | — | — | — | — |
5,500,000
GBP
|
— | — | — | — | — | — |
| Other comprehensive income |
200,000
GBP
|
–
GBP
|
78,700,000
GBP
|
–
GBP
|
— | — |
90,100,000
GBP
|
11,600,000
GBP
|
–
GBP
|
95,500,000
GBP
|
1,000,000
GBP
|
— | — |
17,800,000
GBP
|
–
GBP
|
76,700,000
GBP
|
| Comprehensive income |
900,000
GBP
|
–
GBP
|
80,900,000
GBP
|
–
GBP
|
— | — |
90,100,000
GBP
|
170,100,000
GBP
|
–
GBP
|
76,600,000
GBP
|
100,000
GBP
|
— | — |
153 .2
GBP
|
–
GBP
|
76,700,000
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — |
80,000,000
GBP
|
— | — | — | — | — | — |
76,500,000
GBP
|
— | — | — | — | — | — |
| Comprehensive income, attributable to non-controlling interests | — | — |
900,000
GBP
|
— | — | — | — | — | — |
100,000
GBP
|
— | — | — | — | — | — |