Profit Or Loss [Abstract]
| Concept | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Profit or loss [abstract] | ||||||||||||||
| Profit (loss) [abstract] | ||||||||||||||
| Revenue | — | — | — | — | — | 
                                                223,466,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                23 3, 67 1
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Cost of sales | — | — | — | — | — | 
                                                1  60 ,1 1 4
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                174 , 4 0 4
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Gross profit | — | — | — | — | — | 
                                                63, 3 52
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                59, 267
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Other income | — | — | — | — | — | 
                                                76 6
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                721,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Distribution costs | — | — | — | — | — | 
                                                7, 8 6 9
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                6,633,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Administrative expenses | — | — | — | — | — | 
                                                4 7, 0 2 1
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                4 8 , 6 3 5
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Profit (loss) from operating activities | — | — | — | — | — | 
                                                9 ,427
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                4,630,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Finance income | — | — | — | — | — | 
                                                27 5
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                269,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Finance costs | — | — | — | — | — | 
                                                4,77 4
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                5 , 6 8  8
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Impairment loss (impairment gain and reversal of impairment loss) determined in accordance with IFRS 9 | — | — | — | — | — | 
                                                —
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                1,964,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Other income (expense) from subsidiaries, jointly controlled entities and associates | — | — | — | — | — | 
                                                247,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                —
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Profit (loss) before tax | — | — | — | — | — | 
                                                4,92 8
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                789,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Tax expense (income) | — | — | — | — | — | 
                                                3,888,000
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                3 ,65 1
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Profit (loss) | 
                                                —
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                —
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                —
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                —
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                —
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                1,0 40
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                1 ,04 0
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                —
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                —
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                4 , 4 4 0
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                4 , 4 4 0
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                —
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                —
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
                                                —
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | 
| Profit (loss), attributable to [abstract] | ||||||||||||||
| Profit (loss), attributable to owners of parent | — | — | — | — | — | 
                                                1,0 40
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | — | 
                                                4 , 4 4 0
                                                
                                                    
                                                        GBP
                                                    
                                                
                                             | — | — | — | 
| Earnings per share [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Earnings per share [abstract] | ||||||||||||||
| Earnings per share [line items] | ||||||||||||||
| Basic earnings per share [abstract] | ||||||||||||||
| Basic earnings (loss) per share | — | — | — | — | — | 
                                                0. 7 7
                                                
                                             | — | — | — | — | 
                                                0.0329
                                                
                                             | — | — | — | 
| Diluted earnings per share [abstract] | ||||||||||||||
| Diluted earnings (loss) per share | — | — | — | — | — | 
                                                0. 7 7
                                                
                                             | — | — | — | — | 
                                                0.0329
                                                
                                             | — | — | — |