| Present Location | Longton |
| County Location | Staffordshire |
| Designed For | BR |
| Build Location | Derby |
| Built by | BR |
| Diagram number | 124 |
| Lot number | 30789 |
| Type | FK |
| First Number | 13484 |
| Later Numbers | 19484, ADB 977528 |
| Present Number | ADB 977528 |
| Current Livery | BR Test Vehicle Rail Blue and Pink |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | Mk 2b. Reclassified SK in 1985 as 19484; then Derby Railway Technical Centre (RTC) Test Vehicle. P 1993. Internally modified for and in use as volunteer accommodation - "plumbed in" for the purpose. Retains RTC colours as "Test Service Vehicle 1". 09/21: confirmed still at Midland Railway Centre (at Swanwick Junction). 04/23 moved to Reid Freight Services site at Longton |
| Owner | Class 20 Group |
| External Structural Condition | Satisfactory |
| Internal Structural Condition | Satisfactory |
| Underframe Condition | Satisfactory |
| External Finish | Satisfactory |
| Internal Finish | Satisfactory |
| Degree of External Originality | As left Departmental service |
| Degree of Internal Originality | Conversion/rebuild/reproduction |
| Degree of Underframe/Running Gear Originality | As left Departmental service |
| Degree of External Authenticity | Poor |
| Degree of Internal Authenticity | Not Applicable |
| Degree of Underframe Authenticity | Fair |
| Rarity | Several |
| Historical Importance | Some Interest |
| Storage | Secure Open |
| Operating | No |
| Survey Date | 27/08/2006 |
| Surveyor | Kevin Stroud |
| Photo Date | 15/04/2018 |
| Photo by | Steve West |
| At Risk | No |
| Date Record Last Updated | 01/11/2023 |
