A British EMU built by Bombardier in 2001 to present with numerous variants and primarily seen on services in the South Eastern part of England. Operating on companies Southern and First Capital Connect, now Thameslink.

 

The Class 377s are fitted with internal and external CCTV cameras, there is a disabled seating area, and both intermediate coaches have toilets. Bodyside power doors are electrically operated, a move away from the air powered systems of previous generation EMUs. Dual-voltage units are fitted with a Brecknell Willis high-speed pantograph.

 

On 11 September 2005, units 377472+377474 set the record for a London Bridge to Brighton run of 36 minutes 56 seconds.