South West Trains

South West Trains was the Train Operating Company that held the South Western franchise from 4 February 1996 — the first franchise let in the privatisation of British Railways — until August 2017, operated throughout by Stagecoach Group through three successive franchise renewals. The franchise covered the services from London Waterloo to the south-western suburbs, Portsmouth, Southampton, Bournemouth, Weymouth, Salisbury, Exeter, and Reading — the full extent of the former LSWR and Southern Region territory west of London — making SWT one of the largest TOCs by passenger volume in the privatised network.

South West Trains inherited from Network SouthEast a mixed fleet of aging suburban EMUs and the excellent Class 442 'Wessex Electric' for the Bournemouth and Weymouth services. Its principal rolling stock investment was the Siemens Desiro family — Class 444 five-car units for the Bournemouth main line and Class 450 four-car units for the dense suburban network — which between 2003 and 2007 replaced most of the inherited NSE fleet with modern, air-conditioned stock. The franchise's twenty-one-year run was one of the longest in the privatisation era, passing to the FirstGroup-MTR consortium as South Western Railway in August 2017.