Class 109 (2 vehicles)
The Class 109 is one of preservation's success stories. With only five built for BR service in 1957, they were all withdrawn as non-standard early on, with a single set surviving, heavily modified in departmental use.
This set was saved by the Chasewater Railway, but became dilapidated and in a perilous state by the mid 1990s, its asbestos contamination making it an expensive set to overhaul and restore to service. Minimal restoration work had also been done to the vehicles, which remained in largely departmental condition.
However the Llangollen Railcar Group bought the set and in a ten year project assisted by the Heritage Lottery Fund, returned it to original condition, to excellent standards.
In 2003 the 2-car set was launched back into passenger service as one of the highest quality railcars in the country.
The sole surviving set has become a flagship for DMU preservation in general, and currently lives at the Llangollen Railway in Wales. It has made one visit into England fopr an event and continues to be popular at its home railway.
| Number | Type | Location |
| 50416 | DMBS | Llangollen Railway |
| 56171 | DTCL | Llangollen Railway |