carried out at Stewarts Lane TMD including the installation of cab air-conditioning, sanding equipment, a 750 V busline, shore supply sockets and the removal of overhead line equipment. The 313s commenced operations with Southern on 23 May 2010, providing a two-trains-per-hour service between Brighton and Seaford, and some trains between Brighton and , , and . From 13 December 2010, their operation expanded to stopping services from Brighton to and the to shuttle. The decision to use 313s on the Coastway lines has been controversial, as they are much older than the 377s and have fewer on-board passenger facilities. The rail union RMT criticised the move and many publications, including the BBC, have questioned the introduction of 35-year-old trains in place of much newer units. These trains are deployed on services that operate predominantly over short distances, such as Brighton to Hove and Brighton to Seaford, and some longer (but stopping) services that provide predominantly local links that run alongside 377s on faster services. The introduction of 313s on the Coastway routes facilitated the delivery of additional capacity on high-demand suburban routes in South London, where 10-car trains services are to be introduced combined with platform lengthening. In December 2017, it was announced that unit 313201—originally 313001, the first and oldest Class 313 unit—had been repainted into British Rail's Rail Blue livery, as originally used on the units (though, to meet today's accessibility requirements, the passenger doors were painted entirely grey rather than blue and grey as original). The repaint was part of the C6 overhaul, which included works on the doors, air system and interior, which includes new, modern LED lighting, and for bodywork repairs. The Director of Engineering for Beacon Rail, which owns the Class 313s, has said, "We wanted to celebrate the heritage of this special train, so the re-livery made perfect sense." Former Silverlink/London Overground Silverlink inherited 23 units from British Rail. These were mainly operated under the Silverlink Metro brand on the North London, West London, and Watford DC lines, although they were also regularly used on the St Albans AbbeyWatford Junction branch line between 1988 and the end of the Silverlink franchise in 2007. In 2007 they were used on services transferred to London Overground, which replaced Silverlink Metro. London Overground branding was added, and some seats were removed to provide additional standing room. They were replaced by Class 378 trains, with longitudinal seating