Corporate Information And Statement Of Ifrs Compliance [Abstract]
| Concept | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2023-12-31 | 2022-01-01 to 2022-12-31 | 
|---|---|---|---|---|
| Corporate information and statement of IFRS compliance [abstract] | ||||
| Domicile of entity | — |  | — | — | 
| Legal form of entity | — |  | — | — | 
| Address of entity's registered office | — |  | — | — | 
| Description of nature of entity's operations and principal activities | — |  | — | — | 
| Name of parent entity | — |  | — | — | 
| Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [text block] | — | — | — | — | 
| Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [abstract] | ||||
| Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items] | ||||
| Current inventories | 
                                                82,500,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | 
                                                94,500,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | 
| Explanation of sources of estimation uncertainty with significant risk of causing material adjustment | — |  | — | — | 
| Dividends recognised as distributions to owners per share | — | — | — | 
                                                2 5.0
                                                
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