British Rail Class 387

The British Rail Class 387 Electrostar is an electric multiple unit passenger train built by Bombardier Transportation as part of the Electrostar family. It is a variation of the Class 379 with dual-voltage capability, running on 750 volt DC third rail or 25 kV AC overhead lines. A total of 107 units were built, the first entering service with Thameslink in December 2014, and the class was the last rolling stock order of the Electrostar family, whose 2,805 vehicles were built over 18 years between 1999 and 2017. The Class 387 is currently in service with Gatwick Express, Great Northern, Great Western Railway, Heathrow Express and Southern, in sub-classes 387/1 to 387/3 ordered for Thameslink, Gatwick Express and c2c, and a sub-fleet fitted with ETCS signalling works through the Heathrow tunnels.