The Alliance operates one of the most complex commuter rail networks in the UK as well as operating and maintaining the signalling, points and third rail power supply that the trains need to run. We run nearly 1,700 trains a day, covering more than 600 miles of track and serving nearly 180 stations covering South West London, Surrey, Hampshire and parts of Wiltshire, Berkshire, Devon and Somerset. Together, we run a dedicated control centre where we work to keep trains on our network running as smoothly as possible, as well as dealing with any disruption that occurs.
Most of our trains – as well as trains operated by other operators south of the River Thames: Southern, Southeastern and First Capital Connect – are powered by electricity from a track-level third rail DC electrical system. This relatively low-cost system was introduced in the 1920s and 1930s and is different to the system used by trains that draw power from overhead lines. During normal weather conditions, this system works extremely well and we are able to deliver extremely high levels of punctuality to our customers. In addition, we use a small number of diesel trains largely on the London to Salisbury and Exeter route which are powered by fuel and run without any requirement for electrical power.
Back to top