| Present Location | Pontypool Blaenavon |
| Designed For | LMS |
| Build Location | Wolverton |
| Built by | BR |
| Diagram number | 2166 |
| Lot number | 1570 |
| Type | SLF |
| First Number | 378 |
| Later Numbers | M378M, DB975181 |
| Present Number | M378M |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 6-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | P 1979, NYMR. Interior, underframe equipment partially removed (except bogies). Asbestos stripped ca 1988. Churnet Valley 2/01: Pontypool & Blaenavon 9/06 for volunteer accommodation: 2/08 being plumbed for showers etc. |
| Owner | Private |
| External Structural Condition | Poor but Substantially Complete |
| Internal Structural Condition | Poor and Incomplete |
| Underframe Condition | Poor and Incomplete |
| External Finish | Poor and Incomplete |
| Internal Finish | Poor and Incomplete |
| Degree of External Originality | As built/last Passenger rebuild (BR or before) |
| Degree of Internal Originality | Some replaced/reproduced material |
| Degree of Underframe/Running Gear Originality | As built/last Passenger rebuild (BR or before) |
| Degree of External Authenticity | Good |
| Degree of Internal Authenticity | Satisfactory |
| Degree of Underframe Authenticity | Satisfactory |
| Rarity | Several |
| Historical Importance | of some Importance |
| Storage | Open |
| Operating | No |
| Survey Date | 23/08/2005 |
| Surveyor | Kevin Stroud |
| Photo Date | 23/08/2005 |
| Photo by | Kevin Stroud |
| At Risk | No |