Disclosure Of Entity's Operating Segments [Text Block]
| Concept | As at 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | As at 2021-12-31 | 2021-01-01 to 2021-12-31 | 2021-01-01 to 2021-12-31 | 2021-01-01 to 2021-12-31 | 
|---|---|---|---|---|---|---|---|---|
| Disclosure of entity's operating segments [text block] | — | — |  | — | — | — | — | — | 
| Disclosure of operating segments [text block] | — | — | — | — | — | — | — | — | 
| Disclosure of operating segments [abstract] | ||||||||
| Disclosure of operating segments [line items] | ||||||||
| Tax expense (income) | — | 
                                                –
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                18,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                18,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | 
                                                304,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                304,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Profit (loss) before tax | — | 
                                                10,381,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                7 ,098
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                3,283,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | 
                                                3,24 3
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                9,005,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                12,248,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Profit (loss) | — | 
                                                10,381,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                7 ,116
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                3,265,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | 
                                                2,939,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                9,005,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                11,944,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Assets | 
                                                86,259,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
                                                96,156,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Liabilities | 
                                                30,083,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
                                                30,039,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Cash flows from (used in) operating activities | — | — | 
                                                5,126,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                3,502,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Cash flows from (used in) investing activities | — | — | 
                                                726,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                1,925,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Cash flows from (used in) financing activities | — | — | 
                                                2,909,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                3,007,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             |