| Present Location | Carnforth |
| County Location | Lancashire |
| Designed For | LMS |
| Build Location | Derby |
| Diagram number | 2007 |
| Lot number | 1304 |
| Type | BG |
| First Number | 31129 |
| Later Numbers | M31129 |
| Present Number | 31129 |
| Current Livery | BR Rail Blue |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | P 1979? Offered for sale 7/99. Interior not seen: in use as a store. Roof bandings lifting. Brake gear incomplete (including brake cylinders missing). 08/22: confirmed still visible at Carnforth. |
| Owner | West Coast Railway Company |
| External Structural Condition | Poor but Substantially Complete |
| Internal Structural Condition | Poor and Incomplete |
| Underframe Condition | Fair |
| External Finish | Poor but Substantially Complete |
| Internal Finish | Derelict/Not Present |
| 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 | Some Interest |
| Storage | Secure Open |
| Operating | No |
| Survey Date | 26/07/2008 |
| Surveyor | Kevin Stroud |
| Photo Date | 12/07/1995 |
| At Risk | No |
| Date Record Last Updated | 13/04/2023 |
