High Speed 1 (HS1), formerly known as the Channel Tunnel Rail Link (CTRL), is a 108-kilometre (67 mi) high-speed railway line running from London through Kent to the British end of the Channel Tunnel.   It was built in two stages. The first section between the tunnel and Fawkham Junction in north Kent opened in September 2003, cutting London–Paris journey times by 21 minutes to 2 hours 35 minutes, and London–Brussels to 2 hours 20 minutes. On 14 November 2007, commercial services began over the whole of the new HS1 line. The redeveloped St Pancras International station became the new London terminus for all Eurostar services.  The completion of High Speed 1 has brought the British part of Eurostar's route up to the same standards as the French and Belgian high-speed lines. Non-stop journey times were reduced by a further 20 minutes to 2 hours 15 minutes for London–Paris and 1 hour 51 minutes for London–Brussels.  
However, for this information to be helpful, you need to know if a particular car seat will fit in your particular vehicle. You wouldn’t buy a full-sized vacuum to clean . Here are my experiences fitting a range of seats inside various years of every car, minivan, pickup, and SUV I’ve had the chance to explore, big and small. My focus is on 3 across compatibility, but I’ll also include tips and tricks I’ve found helpful with difficult installations. I’ll periodically update each page as I try more seats in more positions.