The British Rail Class 395 Javelin is a dual-voltage electric multiple unit (EMU) passenger train built by Hitachi Rail as part of the Hitachi A-train AT300 family for high-speed commuter services on High Speed 1 and elsewhere on the South Eastern franchise. The whole fleet is operated by Southeastern.

St Pancras railway station, officially known since 2007 as London St Pancras International, is a major central London railway terminus on Euston Road in the London Borough of Camden. It is the terminus for Eurostar services from Belgium, France and the Netherlands to London. It provides East Midlands Railway services to Leicester, Corby, Derby, Sheffield and Nottingham on the Midland Main Line, Southeastern high-speed trains to Kent via Ebbsfleet International and Ashford International, and Thameslink cross-London services to Bedford, Cambridge, Peterborough, Brighton, Horsham and Gatwick Airport. It stands between the British Library, the Regent's Canal and London King's Cross railway station, with which it shares a London Underground station, King's Cross St Pancras.