Eurostar e320

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The British Rail Class 374, also referred to as the Eurostar e320, is a type of electric multiple unit passenger train used on Eurostar services through the Channel Tunnel to serve destinations beyond the core routes to Paris and Brussels. Passenger services began in November 2015. The trains, owned by Eurostar International Limited, are sixteen-coach versions of the Siemens Velaro. Each train is 400 m (1,300 ft) long. The trains are compliant with the Technical Specifications for Interoperability (TSI). Eurostar International's older fleet of Class 373 "Eurostar e300" trains, introduced in 1994 when the Channel Tunnel opened, could not be used on the 15 kV AC overhead line (OHLE) electrification system used in Germany, and most of the older trains could not be used on the 1.5 kV DC OHLE used in the Netherlands, and the trains did not have sufficient space on board to install ERTMS signalling, which meant that Eurostar could not run services to these countries. The Class 374 was designed and built to overcome these problems and enable Eurostar to run services to these locations. However, on the trains finally ordered, the option of 15 kV AC supply was not included. When the Class 374 trains are used in Britain, they can only run on High Speed 1, which has been designed to accommodate larger trains from mainland Europe, having a larger loading gauge compared to the domestic British rail network. The original order for ten sets was increased to seventeen sets in November 2014. As of June 2025, Eurostar operates their Channel Tunnel services with these 17 Class 374 trains and eight refurbished Class 373 trains.