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Having chortled his way around cereal, crisp and baked-bean factories, a slightly more subdued Gregg Wallace features in this week’s programme.

He’s at the Brompton factory in London, ‘right out of my comfort zone’ as he joins a 28-person production line of master craftspeople to put together the 1,200 parts that make up a Brompton folding bicycle. Meanwhile, Cherry Healey gets a few tips from Team GB’s Olympic cycling coach and finds out how urban cyclists can be safer on the roads.

Ruth Goodman rattles through a fascinating history of our love affair with wheels – including a ride on a ladies’ version of the penny farthing.