Britain invented railways 150 years ago and many of the greatgrandchildren of the men who built and ran them still run them today. Tonight's documentary is about the men and women of a town that lives and breathes railways - Crewe. Crewe was a hamlet until the Grand Junction Railway created a railway colony there and began building engines - 'The Pioneers of 1843.' Since then they have built and repaired tens of thousands of engines and are still hard at it today. The Mayor, like many past mayors of Crewe, is a railwayman, his father was a railwayman and his father before that - ' Crewe has no middle class,' he says, it's a working-class town - it's an island of industry in a vast agricultural area - like a French Foreign Legion Post in the Sahara Desert.' Producer RAMSAY SHORT