| Present Location | Embsay |
| County Location | North Yorkshire |
| Designed For | BR |
| Build Location | York |
| Built by | BR |
| Diagram number | 93 |
| Lot number | 30375 |
| Type | TSO |
| First Number | 4666 |
| Later Numbers | W4666 YDR 7 |
| Present Number | M4666 |
| Current Livery | BR Crimson Lake and Cream |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | P 1989. Part of operational fleet. 09/16: major overhaul under way. 04/21: outshopped on completion of overhaul; livery changed from BR maroon to BR crimson lake and cream; one toilet removed to open up access area; interior views below. |
| Owner | Yorkshire Dales Railway Museum Trust |
| External Structural Condition | Very Good |
| Internal Structural Condition | Very Good |
| Underframe Condition | Very Good |
| External Finish | Very Good |
| Internal Finish | Very 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 | Very Good |
| Degree of Internal Authenticity | Good |
| Degree of Underframe Authenticity | Very Good |
| Rarity | Many |
| Historical Importance | no Immediate Importance/Not Applicable |
| Storage | Secure Open |
| Operating | Yes |
| Survey Date | 23/08/2005 |
| Surveyor | Kevin Stroud |
| Photo Date | 23/09/2022 |
| Photo by | Paul Holroyd |
| At Risk | No |
| Date Record Last Updated | 25/11/2022 |
