Statement Of Cash Flows [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operations |
124,800,000
GBP
|
— |
151,200,000
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities |
900,000
GBP
|
— |
5,600,000
GBP
|
— | — |
| Cash flows from (used in) operating activities |
123,900,000
GBP
|
— |
145,900,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||
| Purchase of property, plant and equipment, classified as investing activities |
88,700,000
GBP
|
— |
91,100,000
GBP
|
— | — |
| Purchase of intangible assets, classified as investing activities |
311,900,000
GBP
|
— |
306,300,000
GBP
|
— | — |
| Cash receipts from repayment of advances and loans made to other parties, classified as investing activities |
–
GBP
|
— |
500,000
GBP
|
— | — |
| Interest received, classified as investing activities |
7,100,000
GBP
|
— |
13,500,000
GBP
|
— | — |
| Cash flows from (used in) investing activities |
374,800,000
GBP
|
— |
383,400,000
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from issuing shares |
111,200,000
GBP
|
— |
310,900,000
GBP
|
— | — |
| Proceeds from issuing other equity instruments |
–
GBP
|
— |
15,000,000
GBP
|
— | — |
| Proceeds from borrowings, classified as financing activities |
1,394,600,000
GBP
|
— |
11,500,000
GBP
|
— | — |
| Repayments of borrowings, classified as financing activities |
1,084,900,000
GBP
|
— |
129,700,000
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities |
9,500,000
GBP
|
— |
7,900,000
GBP
|
— | — |
| Interest paid, classified as financing activities |
122,000,000
GBP
|
— |
122,500,000
GBP
|
— | — |
| Cash flows from (used in) financing activities |
215,800,000
GBP
|
— |
59,700,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
35,100,000
GBP
|
— |
177,800,000
GBP
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents |
2,300,000
GBP
|
— |
13,100,000
GBP
|
— | — |
| Cash and cash equivalents | — |
359,600,000
GBP
|
— |
392,400,000
GBP
|
583,300,000
GBP
|