The Class 395 is a six-car electric multiple unit built by Hitachi for Southeastern, entering service in 2009 on High Speed 1 between London St Pancras International and towns across Kent. Nicknamed Javelin, especially during the 2012 London Olympics shuttle service, the fleet became familiar to commuters and enthusiasts alike. Its interior chime is part of the passenger information system, sounding briefly before automated and live announcements. Recordings of the tone circulate among rail enthusiasts and sound collectors who preserve the small audio details that define a journey.