Class 115 Derby 4-car sets

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 also worked between Liverpool and Manchester in the early years, and from Tyseley in the later years.

In Feb '59 the BTC ordered the power equipment for the first fifteen sets with BUT.

A 4-car set was on display at Marylebone Goods Depot in April '60, at an exhibition of British Railways locomotive, passenger & goods vehicles, and containers. It was for delegates attending the Institute of Transport Congress and for the press.

A rolling stock exhibition was held at the Marylebone parcels depot on May 13th & 14th '61, arranged by the BTC as part of the Golden Jubilee celebrations of the Institute of Locomotive Engineers, which included Class 115 power cars. Pictures of this exhibition appeared in the 19/5/61 issue of Railway Gazette.

In June '61 questions were raised in Parliament about the cost of the Marylebone - High Wycombe - Princes Risborough scheme (including alterations to stations, buildings and tracks, new trains and oil installations). The MP was concerned about the high expenditure for such a small scheme.