The original "Yellow Diamond" multiple working, unique to early DMU's such as Derby Lightweights, has been replaced with the more standard "Blue Square" system, which allows …

British Railways (Derby Lightweight) single unit (DMBS) railcar M79900 at Banbury Merton Street station with a service for Buckingham - c.1958. Remarkably this railcar survives to this day, …

Derby Lightweight single car unit no. 79900 fully restored to passenger carrying standard again after being former test car Iris. The unit now resides on the Ecclesbourne Valley Railway …

Built originally as a 2-car set, 79900 was converted to a single car shortly after being built to allow it to operate on the Branch line from Bletchley to Buckingham. The Derby Lightweights met …

One of only two cars, converted as two experimental single unit cars from a Derby Lightweight twin unit under construction. Used on Buckingham to Banbury service 1956 to 1961. W 1967, …

Two 'double ended' power cars (aka bubble cars) built for the Buckingham - Banbury Experiment. The vehicles had different sizes of guard's vans, resulting in differing numbers of seats. Lot. …

A 6-car comprising of Class 122 W55006, Derby Lightweight M79900 Iris, Class 108 E50599, Class 117 W51360, Class 101 E51505 and Class 119 W51073. Each vehicle a different class …

One of the single cars, 79900, went into departmental use in 1967 as a Eastern Region route learner based at York. It would be renumbered as 975010. The image shows it in York …

Current number: 975010 Any other previous number(s): BR DMU 79900 Livery: GREEN Preserved Railway / Museum: Great Central Railway Categories: Preserved vehicles 975xxx …

Although there were several heritage diesel locomotives in operation, the star attraction at the Great Central Railway's 2022 Autumn Diesel Running Weekend was Derby Lightweight single …