Disclosure Of Income Tax [Text Block]
| Concept | 2023-12-31 to 2024-12-28 | As at 2024-12-28 | As at 2023-12-30 | 2023-01-01 to 2023-12-30 | 
|---|---|---|---|---|
| Disclosure of income tax [text block] | — | — | — | — | 
| Major components of tax expense (income) [abstract] | ||||
| Tax expense (income) | 
                                                1,700,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | 
                                                400,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Disclosure of temporary difference, unused tax losses and unused tax credits [text block] | — | — | — | — | 
| Disclosure of temporary difference, unused tax losses and unused tax credits [abstract] | ||||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | ||||
| Deferred tax assets and liabilities [abstract] | ||||
| Deferred tax assets | — | 
                                                1,200,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                2,500,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | 
| Reconciliation of accounting profit multiplied by applicable tax rates [abstract] |