Michael Portillo reaches the jet age in the Derby suburb of Peartree, where he tours the engineering colossus Rolls-Royce. In Derby city centre, Michael is on the trail of little-known modernist sculptor Ronald Pope, admiring two of his works and discovering how Pope began his working life as an engineer at Rolls-Royce.

The chance to catapult a model train along a 150-metre-long track into a purpose-built wind tunnel takes Michael to Derby's Railway Technical Centre, founded in 1967 and once the largest railway research complex in the world. Michael's last stop is Nottingham, where he finds one of the oldest bicycle companies in the world, Raleigh, and discovers how a bold, new idea became a craze.

Michael Portillo's postwar exploration of Merseyside to Teesside finds him in York, a paradise for rail enthusiasts. In the company of some of the most famous locomotives ever built, he recalls the controversy surrounding their relocation from London to a freight depot in York.

Michael crosses the magnificent Knaresborough viaduct, with its castellated walls and four beautiful arches over the River Nidd, to reach the spa town of Harrogate. On the edge of the elegant town, Michael discovers the gardens at Harlow Carr and learns how they opened in 1950 to test growing conditions for plants in northern climes.

Across town, Michael checks into the headquarters of Yorkshire Tea. And his last destination on this leg of his journey is a bog near Skipton. In the 'gateway to the Dales', he joins members of Yorkshire Peat Partnership to find out what makes a bog.