Photograph by Chris Hogg of an Inter-City 125 pulled by diesel locomotive number 43161. The wires above herald the arrival of electrification to the East Coast Main Line, a project that won approval on the back of the HST's success. HSTs were launched in 1974 and brought about significant improvements in speed and comfort on most of British Rail's main lines. They had diesel power cars at each end of the train. They could run at a top speed of 140 miles per hour, their average speed being about 95 mph.
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