Alex Coomber
A Class 377 and 379 Electrostar 25 KV/750 Volt DC EMU. The most numerous type of EMU with 211 units having been constructed by bombardier at Derby since 2001. They currently operate with Southeastern, Southern and Thameslink franchises. No. 377508 is a 377/5 dual voltage unit built for Thameslink and is seen entering East Croydon on a Bedford to Brighton service in November 2009. Class 700 units have begun to supersede these units on the Thameslink Services.