Disclosure Of Property, Plant And Equipment [Text Block]
| Concept | As at 2022-12-31 | As at 2021-12-31 | 
|---|---|---|
| Disclosure of property, plant and equipment [text block] | — | — | 
| Disclosure of detailed information about property, plant and equipment [text block] | — | — | 
| Disclosure of detailed information about property, plant and equipment [abstract] | ||
| Disclosure of detailed information about property, plant and equipment [line items] | ||
| Property, plant and equipment, revaluation [abstract] | ||
| Property, plant and equipment, revaluation surplus | 
                                                11,499,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                19,236,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             |