Profit Or Loss [Abstract]
| Concept | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2021-01-01 to 2021-12-31 | 2021-01-01 to 2021-12-31 | 2021-01-01 to 2021-12-31 | 
|---|---|---|---|---|---|---|
| Profit or loss [abstract] | ||||||
| Profit (loss) [abstract] | ||||||
| Administrative expenses | 
                                                –
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                1,19 1
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                1,1 91
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                1,164,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                1,164,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Profit (loss) from operating activities | 
                                                10,381,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                6 ,297
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                4,084,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                4,094,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                9,005,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                13,099,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Finance income | 
                                                –
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                39,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                39,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                4,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                4,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Finance costs | 
                                                –
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                840,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                840,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                855,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                855,000
                                                
                                                    
                                                        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
                                                    
                                                
                                             | 
| Tax expense (income) | 
                                                –
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                18,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                18,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                304,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                304,000
                                                
                                                    
                                                        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
                                                    
                                                
                                             | 
| Earnings per share [text block] | — | — | — | — | — | — | 
| Earnings per share [abstract] | ||||||
| Earnings per share [line items] | ||||||
| Diluted earnings per share [abstract] | ||||||
| Diluted earnings (loss) per share | — | 
                                                137 .0
                                                
                                             | — | — | — | 
                                                2.305
                                                
                                             |