Disclosure Of Sustainability-Related Financial Information
| Concept | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | 2022-04-01 to 2023-03-31 | 2021-04-01 to 2022-03-31 | 2020-04-01 to 2021-03-31 | 2019-04-01 to 2020-03-31 | 
|---|---|---|---|---|---|---|
| Disclosure of Sustainability-related Financial Information | ||||||
| Scope 1 and 2 greenhouse gas emissions | ||||||
| Gross scope 1 greenhouse gas emissions | 
                                                538,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                564,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                615,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                674,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                642,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                673,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
| Gross scope 2 greenhouse gas emissions | 
                                                384,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                390,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                400,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                420,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                409,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                451,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
| Gross scope 1 and 2 greenhouse gas emissions | 
                                                922,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                954,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,015,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,094,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,051,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,124,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             |