Disclosure Of Non-Current Assets Held For Sale And Discontinued Operations [Text Block]
| Concept | 2023-12-31 to 2024-12-28 | 2023-01-01 to 2023-12-30 | 
|---|---|---|
| Disclosure of non-current assets held for sale and discontinued operations [text block] | — | — | 
| Disclosure of analysis of single amount of discontinued operations [text block] | — | — | 
| Disclosure of analysis of single amount of discontinued operations [abstract] | ||
| Disclosure of analysis of single amount of discontinued operations [line items] | ||
| Profit (loss) before tax | 
                                                4,500,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                3,100,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Revenue | 
                                                96,000,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                88,000,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Profit (loss) from discontinued operations | 
                                                800,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Cash flows from continuing and discontinued operations [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Cash flows from (used in) operating activities, continuing operations | 
                                                5,800,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                4,200,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Cash flows from (used in) operating activities, discontinued operations | 
                                                300,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                200,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Cash flows from (used in) operating activities | 
                                                5,500,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                4,400,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Cash flows from (used in) investing activities [abstract] | ||
| Cash flows from (used in) investing activities, continuing operations | 
                                                2,600,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                17,400,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Cash flows from (used in) investing activities, discontinued operations | 
                                                -
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                100,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Cash flows from (used in) investing activities | 
                                                2,600,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                17,300,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Cash flows from (used in) financing activities [abstract] | ||
| Cash flows from (used in) financing activities, continuing operations | 
                                                2,700,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                3,400,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Cash flows from (used in) financing activities, discontinued operations | 
                                                -
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Cash flows from (used in) financing activities | 
                                                2,700,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                3,400,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Increase (decrease) in cash and cash equivalents, discontinued operations | 
                                                300,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                300,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             |