The British Rail Class 222 Meridian: A High-Speed Diesel Workhorse Facing Retirement
In short: Capable of 125 mph, the Class 222 Meridian has served as a vital diesel-electric link for British rail passengers since 2004. Despite its impressive acceleration and engineering, this fleet is now transitioning toward retirement as newer technology prepares to take over its long-standing routes across the United Kingdom.
The Class 222 Meridian, a diesel-electric multiple-unit train, was manufactured by Bombardier Transportation in Bruges, Belgium, between 2003 and 2005. Designed for high-speed performance, each car is equipped with a Cummins QSK19 diesel engine producing 750 horsepower. This power is converted into electricity to drive Alstom Onix 800 motors, allowing the trains to reach speeds of 125 mph. A notable feature of the Class 222 is its rheostatic braking system, which converts the motors into generators during deceleration, dissipating energy as heat through roof-mounted resistors to reduce wear on brake shoes.
Throughout its operational life, the fleet has undergone significant reconfigurations. Originally ordered by Midland Mainline and Hull Trains, the units were frequently modified to meet changing service demands. For example, in 2008, carriages were shifted between sets to create a mix of five-car and seven-car formations, optimizing capacity for routes between London St Pancras and Sheffield. These trains were prized for their superior acceleration compared to the High Speed Trains they replaced, notably cutting journey times by 12 minutes on the Sheffield fast service starting in December 2008.
The Class 222 has also faced operational challenges, including safety incidents investigated by the Rail Accident Investigation Branch. These ranged from a 2006 door-opening incident caused by a software bug and debris, to a 2010 derailment near East Langton resulting from an axle fracture. Despite these hurdles, the fleet remained a staple of the East Midlands network. Today, the Class 222 is entering its final chapter; the units are scheduled to be replaced by Class 810 trains on East Midlands Railway services, while ScotRail has announced plans to lease twenty-two units for an extensive refurbishment program beginning in 2027.
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Sources
- Summary by Intellect · source: British Rail Class 222
- Also: Wikidata — British Rail Class 222 · CC0
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