Early preservation days at the Llangollen Railway. The railway's first DMU is pictured at Llangollen station on 14 April 1985. Nearest the camera is diesel hydraulic Class 127 51618, which is working with freshly restored Class 105 56456. Although the 127 unit has the unusual red triangle multiple working code, it is able to operate with the more common blue square unit (such as the 105), as long as the driver remembers he is connected to a mechanical transmission unit, and makes sure that he changes up through all the gears.