High Speed 1 (HS1), officially known as the Channel Tunnel Rail Link (CTRL) and originally as the Continental Main Line (CML), is a high-speed railway line running from London through Kent to the British end of the Channel Tunnel. International passenger services are currently provided by Eurostar, with journey times of London St Pancras to Paris Gare du Nord in 2 hours 15 minutes, and from St Pancras to Brussels-South in 1 hour 51 minutes, using a fleet of 27 Class 373/1 multi-system trains capable of . Other, competing, passenger operators are expected to use the line in future.