The Train Guy's video: 200 Kmph High Speed Train Action Trainsets pass through a very old station building at 100-125 mph

Trainsets are unarguably the fastest types of trains in the world. Location : Slough, UK Trains : Great Western Railway (GWR) Class 800 Series IETs. The British Rail Class 800 Intercity Express Train or Azuma is a type of bi-mode multiple unit train built by Hitachi for Great Western Railway and London North Eastern Railway. The type uses electric motors powered from overhead electric wires for traction, but also has diesel generators to enable trains to operate on unelectrified track. It is a part of the Hitachi AT300 product family. The respective operators of the units have also given their units their own unique brand with the GWR units being known as the Intercity Express Train (IET) and LNER units being known as the Azuma. Great Western Railway's Class 800 and 802 units are being named after "inspirational people" who have influenced the regions that the company serves. 800003 is named after the former Queen of England, Queen Elizabeth.