Statement Of Financial Position [Abstract]
| Concept |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-01-01 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||||||||||||
| Non-current assets [abstract] | |||||||||||||||||||||||||||||||
| Property, plant and equipment |
353,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
369,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
355,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
70,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
74,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
76,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Trade and other non-current receivables |
5,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
6,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
156,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
133,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
156,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Other non-current financial assets |
–
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |
500,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Non-current assets |
2,181,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,978,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,974,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||||||||||||||||||
| Current inventories |
272,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
286,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
196,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Trade and other current receivables |
322,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
245,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
243,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Other current financial assets |
3,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
8,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
7,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
392,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
583,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
418,900,000
GBP
|
— | — | — |
418,900,000
GBP
|
— | — | — | — | — | — |
| Current assets |
991,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,125,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
867,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Assets |
3,173,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
3,104,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,842,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||||||||||||
| Issued capital |
82,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
69,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
11,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Retained earnings |
1,437,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,233,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
711,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Share premium |
2,094,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,697,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,123,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
902,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
704,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
592,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Non-controlling interests |
20,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
19,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
18,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Equity |
923,100,000
GBP
|
1,437,700,000
GBP
|
9,300,000
GBP
|
20,800,000
GBP
|
2,094,500,000
GBP
|
82,400,000
GBP
|
2,500,000
GBP
|
143,900,000
GBP
|
800,000
GBP
|
6,600,000
GBP
|
723,500,000
GBP
|
19,500,000
GBP
|
1,697,400,000
GBP
|
9,300,000
GBP
|
1,233,900,000
GBP
|
69,900,000
GBP
|
6,500,000
GBP
|
143,900,000
GBP
|
4,300,000
GBP
|
6,600,000
GBP
|
611,400,000
GBP
|
6,600,000
GBP
|
711,400,000
GBP
|
9,300,000
GBP
|
611,400,000
GBP
|
6,700,000
GBP
|
143,900,000
GBP
|
18,600,000
GBP
|
1,123,400,000
GBP
|
2,700,000
GBP
|
11,600,000
GBP
|
| Liabilities [abstract] | |||||||||||||||||||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||||||||||||||||||
| Non-current provisions [abstract] | |||||||||||||||||||||||||||||||
| Non-current provisions |
23,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
22,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
19,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Trade and other non-current payables |
122,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
43,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
43,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
–
GBP
|
— | — | — | — | — | — | — | — | — |
700,000
GBP
|
— | — | — | — | — | — | — | — | — |
800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Non-current liabilities |
1,263,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,324,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,311,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | |||||||||||||||||||||||||||||||
| Current provisions [abstract] | |||||||||||||||||||||||||||||||
| Current provisions |
20,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
18,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
19,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Trade and other current payables |
840,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
891,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
735,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Other current financial liabilities |
25,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
26,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
34,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Current liabilities |
986,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,056,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
920,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
| Liabilities |
2,249,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,380,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,231,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |