High-speed rail in the United Kingdom is provided on five upgraded railway lines running at top speeds of 125 mph and one purpose-built high-speed line reaching 186 mph.
Mallard, the record-holding steam locomotive, with a recorded top speed of 126 mph (203 km/h)
APT-P (Class 370), at Carlisle, 1983
An InterCity 125 train at Hull Paragon station in 1982. The InterCity 125 is the world's fastest diesel train.
GNER liveried InterCity 225
InterCity 125
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The InterCity 125 or High Speed Train is a diesel-powered high-speed passenger train built by British Rail Engineering Limited between 1975 and 1982. A total of 95 sets were produced, each comprising
An InterCity 125 in original British Rail livery
The Blue Pullmans, which were in service between 1960 and 1973, are often seen as forerunners of the HSTs.
Class 252 prototype HST at Weston-super-Mare in 1975
An InterCity 125 about to depart Manchester Piccadilly in 1986