Virgin Trains has achieved a rail speed record on the 401-mile route from Glasgow - London with a non-stop journey time of three hours and 55 minutes - an impressive average speed of 102.5 mph - beating the previous verified southbound speed record of four hours and 14 minutes set by British Rail's Advanced Passenger Train in the 1980s.
Current fastest scheduled time is around 4.5 hours southbound which compares with a city centre time of under four hours by plane, depending on security hold-ups.
http://www.virgintrains.co.uk/