| Present Location | Spa Valley |
| County Location | Kent |
| Designed For | BR |
| Build Location | Swindon |
| Built by | BR |
| Diagram number | 73 |
| Lot number | 30717 |
| Type | FO |
| First Number | 3131 |
| Later Numbers | M3131, E3131 |
| Present Number | 3131 |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | Centre doors sealed. Latterly owned by EWS/DBS. P 04/13 by WSR Association. 12/18: purchased by Spa Valley Railway for use on Dining Trains but at Cranmore Traincare and Maintenance Services (ESR) for overhaul prior to move to Tunbridge Wells. 04/20: moved to Spa Valley following major overhaul; the plan is to restore the interior as closely as possible to its original 1960s appearance with horse chestnut leaf moquette. 10/21: conversion work under way to allow wheelchair access. |
| Owner | Spa Valley Railway |
| External Structural Condition | Very Good |
| Internal Structural Condition | Very Good |
| Underframe Condition | Very Good |
| Internal Finish | Fair |
| 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 Internal Authenticity | Very Good |
| Degree of Underframe Authenticity | Good |
| Rarity | Many |
| Historical Importance | Some Interest |
| Storage | Secure Open |
| Operating | No |
| Survey Date | 13/09/2015 |
| Surveyor | D Wigley |
| Photo Date | 14/02/2019 |
| Photo by | Tim Robbins |
| At Risk | No |
| Date Record Last Updated | 25/10/2021 |
