| Present Location | Dean Forest Railway |
| County Location | Gloucestershire |
| Designed For | BR |
| Build Location | Derby |
| Built by | BR |
| Diagram number | 609 |
| Lot number | 30461 |
| Type | DMCL |
| First Number | 51566 |
| Later Numbers | M51566 |
| Present Number | M51566 |
| Current Livery | BR multiple unit green livery |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | Class 108. P 1993. Was part of operational 3-car set at Peak Rail. Original light fittings. To Dean Forest by 10/08. Worked to 2019, latterly paired with E50619 (qv) (and E59387 (qv), as required). 2020: used in October only (with M51914 or M56492). 11/20: taken out of service for major work (replacement final drive, engine and radiator). |
| External Structural Condition | Good |
| Internal Structural Condition | Good |
| Underframe Condition | Good |
| External Finish | Satisfactory |
| Internal Finish | Good |
| Degree of External Originality | Some replaced/reproduced material |
| Degree of Internal Originality | Some replaced/reproduced material |
| Degree of Underframe/Running Gear Originality | Some replaced/reproduced material |
| Degree of External Authenticity | Good |
| Degree of Internal Authenticity | Good |
| Degree of Underframe Authenticity | Good |
| Rarity | Several |
| Historical Importance | no Immediate Importance/Not Applicable |
| Storage | Secure Open |
| Operating | No |
| Survey Date | 17/05/1998 |
| Surveyor | Trevor England |
| Photo Date | 04/12/2019 |
| Photo by | Nigel Benning |
| At Risk | No |
| Date Record Last Updated | 09/03/2024 |
