| Present Location | Didcot (scrapped) |
| County Location | Oxfordshire |
| Designed For | BR |
| Build Location | Derby |
| Built by | BR |
| Diagram number | 7 / AS403 |
| Lot number | 30960 |
| Type | SLEP |
| First Number | 10509 |
| Later Numbers | E10509 |
| Present Number | E10509 |
| Current Livery | BR Rail Blue and Pearl Grey |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | Convertible sleeper: 12 1st, or 24 2nd accommodation. Early 1990s: stored in MT Sidings of the Arncott site at MoD Bicester from where sold into preservation 1994 at Didcot. BT10 bogies replaced with 'accommodation' Commonwealth bogies before preservation. Used as volunteer accommodation at Didcot. Doors replaced. 04/24: disposed for scrap to European Metal Recycling, Kingsbury, Warwickshire. |
| Owner | Great Western Society Ltd |
| External Structural Condition | Satisfactory |
| Internal Structural Condition | Satisfactory |
| Underframe Condition | Poor but Substantially Complete |
| External Finish | Fair |
| 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 | Fair |
| Degree of Underframe Authenticity | Fair |
| Rarity | Many |
| Historical Importance | no Immediate Importance/Not Applicable |
| Operating | No |
| Survey Date | 20/08/2004 |
| Surveyor | Kevin Stroud |
| Photo Date | 20/08/2004 |
| Photo by | Kevin Stroud |
| At Risk | No |
| Date Record Last Updated | 02/08/2024 |
