| Present Location | Hemel Hempstead |
| County Location | Hertfordshire |
| Designed For | BR |
| Build Location | Swindon |
| Built by | BR |
| Diagram number | 171 |
| Lot number | 30669 |
| Type | BCK |
| First Number | 21240 |
| Present Number | M21240 |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | P.1991 at NYMR. By 02/03 for sale. by 05/04 'for disposal' expected to be scrapped. By 07/06 to Weardale. By 02/15 to Multi-Tal Logistics Ltd (successors to Rail Restorations North East Ltd) at Shildon for overhaul. By 01/18 to D C Engineering and Restorations, Shildon. Remained at Shildon when D C Engineering and Restorations relocated to Spennymoor. 02/21: moved from Shildon by road to new location at Boxted Farm, Potten End, Hemel Hempstead. |
| External Structural Condition | Poor but Substantially Complete |
| Internal Structural Condition | Poor but Substantially Complete |
| Underframe Condition | Poor and Incomplete |
| External Finish | Poor but Substantially Complete |
| Internal Finish | Poor but Substantially Complete |
| 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 | Good |
| Degree of Underframe Authenticity | Good |
| Rarity | Many |
| Historical Importance | no Immediate Importance/Not Applicable |
| Storage | Secure Open |
| Operating | No |
| Survey Date | 12/04/2003 |
| Surveyor | Kevin Stroud |
| Photo Date | 12/12/2000 |
| At Risk | No |
| Date Record Last Updated | 08/08/2021 |
