D55 | Derbyshire and Nottinghamshire Electric Power Company (1901-1948) | 1935 | Derbyshire and Nottinghamshire Electric Power Company (1901-1948) | Derbyshire Record Office |
D3184 | Derbyshire and Nottinghamshire Electric Power Company Ltd (1901-1948) and East Midlands... | 1901-1963 | Derbyshire and Nottinghamshire Electric Power Company Ltd (1901-1948) | Derbyshire Record Office |
D4467 | Derbyshire and Nottinghamshire Electric Power Company | 1902-1933 | Derbyshire and Nottinghamshire Electric Power Company | Derbyshire Record Office |
D4569 | Urban Electric Supply Company Ltd | 1910-1920 | Urban Electric Supply Company Ltd | Derbyshire Record Office |
D5164/UL | Electricity supply maps | mid 20th cent | Unidentified | Derbyshire Record Office |
D5907 | East Midlands Electricity Board | 1966-1989 | East Midlands Electricity Board | Derbyshire Record Office |
D6839 | West Coast Energy Ltd: Carsington Wind Farm | 2006 | West Coast Energy Ltd: Carsington Wind Farm | Derbyshire Record Office |