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 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 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 | — | — | — |
86,000,000
GBP
|
— |
74,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Investment property | — | — | — |
800,000
GBP
|
— |
800,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Non-current assets | — | — | — |
412,000,000
GBP
|
— |
380,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||
| Current inventories | — | — | — |
344,700,000
GBP
|
— |
333,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Trade and other current receivables | — | — | — |
461,600,000
GBP
|
— |
353,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — |
541,300,000
GBP
|
— |
431,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Current assets | — | — | — |
1,618,200,000
GBP
|
— |
1,413,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Assets | — | — | — |
2,030,200,000
GBP
|
— |
1,794,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||
| Equity [abstract] | |||||||||||||||
| Issued capital | — | — | — |
2,400,000
GBP
|
— |
2,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — |
508,400,000
GBP
|
— |
436,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Share premium | — | — | — |
56,000,000
GBP
|
— |
55,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Other reserves | — | — | — |
1,300,000
GBP
|
— |
1,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — |
568,100,000
GBP
|
— |
496,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Equity |
56,000,000
GBP
|
2,400,000
GBP
|
508,400,000
GBP
|
568,100,000
GBP
|
1,300,000
GBP
|
496,200,000
GBP
|
55,900,000
GBP
|
436,800,000
GBP
|
2,400,000
GBP
|
1,100,000
GBP
|
474,200,000
GBP
|
427,100,000
GBP
|
1,000,000
GBP
|
45,800,000
GBP
|
2,300,000
GBP
|
| Liabilities [abstract] | |||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||
| Non-current provisions [abstract] | |||||||||||||||
| Non-current provisions | — | — | — |
19,400,000
GBP
|
— |
21,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Trade and other non-current payables | — | — | — |
28,200,000
GBP
|
— |
37,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Deferred tax liabilities | — | — | — |
8,700,000
GBP
|
— |
6,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Non-current liabilities | — | — | — |
101,000,000
GBP
|
— |
107,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | |||||||||||||||
| Current provisions [abstract] | |||||||||||||||
| Current provisions | — | — | — |
76,700,000
GBP
|
— |
55,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Trade and other current payables | — | — | — |
1,087,000,000
GBP
|
— |
963,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Current tax liabilities, current | — | — | — |
1,900,000
GBP
|
— |
5,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Current liabilities | — | — | — |
1,361,100,000
GBP
|
— |
1,191,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — |
1,462,100,000
GBP
|
— |
1,298,200,000
GBP
|
— | — | — | — | — | — | — | — | — |