Disclosure Of Fair Value Measurement [Text Block]
| Concept | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disclosure of fair value measurement of assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disclosure of fair value measurement of assets [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of assets [line items] | |||||||||||||||||||||
| Assets | — | 
                                                229,00 3
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                230,159,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
| Reconciliation of changes in fair value measurement, assets [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disclosure of fair value measurement of liabilities [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [line items] | |||||||||||||||||||||
| Liabilities | — | 
                                                1 0 7, 9 2 3
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                105,981,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
| Reconciliation of changes in fair value measurement, liabilities [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of equity [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disclosure of fair value measurement of equity [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of equity [line items] | |||||||||||||||||||||
| Equity | 
                                                16, 328
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                121,080,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                22 , 537
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                1,833,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                6,806,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                68 ,09 5
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                9 , 147
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                16, 328
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                70, 20 5
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                22 , 537
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                6,806,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                2  ,1 9 4
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                124 ,17 8
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                10,49 6
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                135, 8 89
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                22, 530
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                6,805,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                3 ,017
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                78 , 5 6 1
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                1 6 , 328
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                14,682,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |