Built by BR Derby Introduced: 1960 Coupling Code: Blue Square Body: 63ft 6in x 9ft 3in Engines: BUT (Leyland Albion) of 230hp Transmission: Standard mechanical
These 41 high density sets operated the outer-suburban services from Marylebone to Aylesbury, High Wycombe and Banbury, which were known as the Chiltern Lines. Strangely, these were under Table 115 in the timetable!
Based on the basic Derby high density design, some sets were also built for the CLC line between Liverpool and Manchester, and they also worked from Tyseley in the later years.
The Marylebone sets, which were later transferred to Bletchley but remained on Chiltern Line duties, were declared surplus after the introduction of Class 165s, from '91 onwards. While at Bletchley depot the class was also used on the Barking to Gospel Oak line, units being formed as power twins. They were in turn replaced on this line by class 117 power twins.
The final Class 115 working out of Marylebone was in July '92. The Tyseley sets survived a bit longer until Feb '94.
The BritishRailClass950 is a diesel multiple unit that was purpose-built for departmental use as a track assessment unit.
It was built in 1987 using the same bodyshell as the Class 150/1 "Sprinter" units that were built from 1985-1986.
It was originally classified as a Class180 test unit, but since this designation is now used by the new First Great Western "Adelante" units, it has been reclassified into the departmental series.
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