| Present Location | Aln Valley Railway |
| County Location | Northumberland |
| Designed For | BR |
| Build Location | Derby |
| Built by | BREL/Alexander |
| Diagram number | DP241 |
| Lot number | 31016 |
| Type | DMSL |
| First Number | 55839 |
| Present Number | 55839 |
| Current Livery | Northern |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4 wheel |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | With 55816 and 55852 (qv) formed unit 144016. P 01/21 at Aln Valley Railway. |
| Owner | Aln Valley Railway |
| External Structural Condition | Very Good |
| Underframe Condition | Good |
| External Finish | Good |
| 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 | Good |
| Degree of Underframe Authenticity | Good |
| Rarity | Many |
| Historical Importance | no Immediate Importance/Not Applicable |
| Storage | Secure Open |
| Operating | Yes |
| Survey Date | 13/04/2023 |
| Surveyor | Andrew Jenkins |
| Photo Date | 13/04/2023 |
| Photo by | Andrew Jenkins |
| At Risk | No |
| Date Record Last Updated | 30/05/2023 |
