Disclosure Of Business Combinations [Text Block]
| Concept | 2023-12-31 to 2024-12-28 | As at 2024-12-28 | As at 2023-12-30 | 
|---|---|---|---|
| Disclosure of business combinations [text block] |  | — | — | 
| Disclosure of reconciliation of changes in goodwill [text block] | — | — | — | 
| Disclosure of reconciliation of changes in goodwill [abstract] | |||
| Disclosure of reconciliation of changes in goodwill [line items] | |||
| Reconciliation of changes in goodwill [abstract] | |||
| Goodwill | — | 
                                                13,700,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                13,300,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             |