| Present Location | Leavesden |
| County Location | Hertfordshire |
| Designed For | BR |
| Build Location | Derby |
| Built by | BR |
| Diagram number | 146 |
| Lot number | 30685 |
| Type | SK |
| First Number | 25806 |
| Later Numbers | 18806, 99721 |
| Present Number | 99721 |
| Current Livery | BR Maroon |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | P 1990 by Train Tours. Maroon livery. Air brakes added. At Tyseley till to Carnforth by 8/01. Main photo above: visiting NRM, York 06/12. 04/17: currently with locomotive ‘Olton Hall’ (aka ‘Hogwarts Castle’) at the Warner Bros Harry Potter Studio Tour, Leavesden (near Watford) - see additional photo below. |
| Owner | West Coast Railway Company |
| External Structural Condition | Good |
| Internal Structural Condition | Good |
| Underframe Condition | Good |
| External Finish | Good |
| Internal Finish | 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 | Very Good |
| Degree of Underframe Authenticity | Very Good |
| Rarity | Many |
| Historical Importance | no Immediate Importance/Not Applicable |
| Storage | Secure Building |
| Operating | Yes |
| Survey Date | 26/07/2008 |
| Surveyor | Kevin Stroud |
| Photo Date | 09/06/2012 |
| Photo by | Dan Adkins |
| At Risk | No |
| Date Record Last Updated | 15/05/2017 |
