The world rail speed record was last set on 3 April 2007 by a French TGV train, reaching a speed of 574.8 km/h on a special record-setting attempt on the TGV Est route between Paris and Strasbourg.
This is well above the fastest normal TGV operational speed of 320 km/h and also beats the UK rail speed record of 334.7 km/h, set by a Eurostar train, by a very long way.
At this incredible speed it would take just under an hour to travel the 530 km between London and Edinburgh. In comparison, this route is currently operated by InterCity 225 trains which, although capable of over 225 km/h, are limited by signalling to a top speed of only 200 km/h; only 2/3 of the typical TGV speed and barely 1/3 of this world record!