The British Rail Class 175 Coradia is a diesel multiple unit designed for regional and intercity passenger services in the United Kingdom. Built by Alstom between 1999 and 2001, the Class 175 forms part of the Coradia family of trains and replaced older regional rolling stock on a number of routes. The type is typically based at Chester Depot and is widely seen on services along the North Wales Coast, between Holyhead and South Wales, and on services radiating from the Manchester area.
Design and features
Class 175 units were produced in short two- and three-car formations to provide flexible capacity for regional services. They were designed with features common to late-1990s regional stock: a maximum service speed of around 100 mph, air-conditioned interiors, accessible toilets, and onboard passenger information systems. Interiors were configured for a mix of standard and higher-comfort seating to suit journeys of varying length.
Characteristics
- Manufacturer: Alstom, built at Washwood Heath in Birmingham (Washwood Heath).
- Construction period: 1999–2001.
- Formation: two- and three-car sets for regional operations.
- Role: regional and medium-distance express services, frequent stops with reasonable cruising speed.
History and development
The Class 175 was introduced as part of a late-1990s fleet renewal programme to improve comfort, reliability and speed on inter-regional routes. Early in their service lives the units underwent a period of entry-to-service adjustments typical for new train types. Over time they established themselves as the principal diesel multiple unit for many Welsh services and routes into northwest England, remaining in regular use and receiving updates and repainting as operators changed.
Operations and importance
These units are important for linking urban centres with coastal and regional destinations. Typical workings include services from Holyhead along the North Wales Coast to South Wales and onward connections to Manchester and other major stations. Their mix of speeds and onboard facilities makes them suitable for both commuter and longer regional journeys.
Notable distinctions and facts
The Class 175 is often contrasted with earlier first-generation DMUs and with modern electric multiple units: it offers modern amenities and higher speeds than older regional trains but, being diesel powered, operates where electrification is absent. When discussing the Class 175 it is useful to note its place in the broader Coradia family of Alstom designs and its continued role on non-electrified inter-regional routes. For a general explanation of what these trains are, see diesel multiple unit.