| Present Location | Gwili |
| County Location | Carmarthenshire |
| Designed For | BR |
| Built by | Pressed Steel |
| Diagram number | 535 |
| Lot number | 30548 |
| Type | DMS |
| First Number | 51401 |
| Present Number | W51401 |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | Paired with 51347. To Nene Valley Railway direct from service at Bletchley. BR blue/grey livery. For disposal by 07/08 and to Gwili Railway by 04/09. Restored and in service by 08/14. By 08/23: following merger of Caerphilly Railway Society, Gwili Vintage Carriage Group and Swansea Vale Railway, now owned by Welsh Railways Trust. |
| Owner | Welsh Railways Trust |
| External Structural Condition | Good |
| Internal Structural Condition | Good |
| Underframe Condition | Good |
| External Finish | Good |
| Internal Finish | Satisfactory |
| Degree of External Originality | As built/last Passenger rebuild (BR or before) |
| Degree of Internal Originality | As built/last Passenger rebuild (BR or before) |
| Degree of Underframe/Running Gear Originality | As built/last Passenger rebuild (BR or before) |
| Degree of External Authenticity | Very Good |
| Degree of Internal Authenticity | Very Good |
| Degree of Underframe Authenticity | Very Good |
| Rarity | Several |
| Historical Importance | no Immediate Importance/Not Applicable |
| Storage | Secure Open |
| Operating | Yes |
| Survey Date | 11/09/2006 |
| Surveyor | Gordon Maslin |
| Photo Date | 21/08/2014 |
| Photo by | Aaron Browning |
| At Risk | No |
| Date Record Last Updated | 04/09/2023 |
