World's Greatest Bridges: The Iron Bridge, Shropshire

A symbol of the Industrial Revolution, the elegant Iron Bridge over the river Severn in rural Shropshire was the world's first bridge to be constructed entirely from iron. Rob reveals the difficulties encountered in building it, the scepticism of contemporary engineers, how it inspired Thomas Telford to design the Pontcysyllte Aqueduct and the bridge's role as a catalyst for the birth of a civil engineering.