London Overground Class 378 EMU

Bombardier Transportation Class 378 'Capitalstar' Electric Multiple Unit

Introduced:  July 2009        Number in Service:  57        Number of Carriages:  5        Seating Capacity: 270        Max Speed: 75mph

Line(s) Operated:

  • East London Line
  • North London Line
  • South London Line
  • Watford DC Line
  • West London Line


The Class 378 ‘Capitalstar’ Electric Multiple Unit (EMU) is built by Derby based Bombardier Transportation and is a member of the ‘Electrostar’ family of multiple units.

Introduced in July 2009, the Class 378 units allowed the removal of older Class 313, Class 508 & Class 456 Electric Multiple Units, as well as London Underground A60/62 Stock units from service on the electrified lines that London Overground took over.

The Class 378 units operate as two separate classes:

  • Class 378/1 – 750v DC for the East & South London Lines only.
  • Class 378/2 – 25kV AC/750v DC Dual voltage units for use on all lines

In July 2015, London Overground announced an order for 45 new Class 710 units, some of which would displace the Class 378s in use on the Watford DC Lines to strengthen services on the remaining lines.


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