The
initial batch units, class 319/0, were formed Driving Trailer Standard (DTS),
Pantograph Motor Standard (PMS), Auxiliary Trailer Standard (ATS) and
another DTS. 319 units began passenger service on some Southern Region
internal services from the weekend of 9/10 April 1988. Full Thameslink service
commenced in May 1988. To start the cross London
service, which became known as "Thameslink", an initial batch of 60 class 319
units was built. They used the same Mk3 EMU body shells as class 317 and 318
units, but they had slightly increased passenger space in the driving cars.
First Capital Connect commenced its franchise operation on 1st April 2006 which
runs until 31st March 2015.