| Present Location | Llangollen |
| County Location | Denbighshire |
| Designed For | BR |
| Build Location | Derby |
| Built by | BR |
| Diagram number | 646 |
| Lot number | 30602 |
| Type | DTCL |
| First Number | 56504 |
| Later Numbers | 54504 |
| Present Number | M54504 |
| Current Livery | BR multiple unit green livery |
| Gauge | 4ft 8 1/2in |
| Wheel Arrangement | 4-w bogies |
| Original Underframe | Yes |
| Original Bogies/Wheelsets | Yes |
| Additional Notes | Class 108. P 1993 at Peak Rail. To Swanage on long-term loan (paired with W51933)(qv) 1997. In green livery by 12/01. 01/19: to Llangollen - and into operational use there 06/19. 07/21: still in use at Llangollen (see additional photo below). |
| Owner | Peak Rail DMU Group |
| 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 | Good |
| Degree of Underframe Authenticity | Very Good |
| Rarity | Several |
| Historical Importance | Some Importance |
| Storage | Secure Open |
| Operating | Yes |
| Survey Date | 01/08/1999 |
| Surveyor | Michael Cope |
| Photo Date | 14/07/2015 |
| Photo by | Steve West |
| At Risk | No |
| Date Record Last Updated | 29/07/2021 |
