Description The Inter-City 125 was the brand name of British Rail's High Speed Train (HST) fleet, which was built from 1975 to 1982 and was introduced into service in 1976.
The Inter-City 125 train is made up of two Class 43 power cars, one at each end of a set of carriages (the number of carriages varies by operator).
The train operates at speeds of up to 125 mph in regular service, making it the fastest diesel-powered train in the world, a record it has held from its introducti.