Documentary examining the high speed train, a vehicle which saved the world's oldest railway network when the Intercity 125 debuted in 1976. Celebrities including Prue Leith, Peter Purves and Pete Waterman offer their memories of one of Britain's favourite trains.

How a canny marketing campaign persuaded unenthusiastic Brits to embrace what new trains had to offer. Among the features were improved refreshment options. Prue Leith explains how banishing the soggy sandwich from British Rail was vital to restoring the railway's fortunes.