England Galton Bridge, Smethwick, worlds longest single-span bridge when built. Humber Bridge, longest bridge in the UK; spans the Humber estuary. Ironbridge, the first cast iron bridge. Severn Bridge and Second Severn Crossing, connect England to Wales List of Severn bridges Tinsley viaduct, two-tier road-bridge in Sheffield. Royal Albert Bridge, railway bridge across the River Tamar from Plymouth to Saltash Tamar Bridge, road bridge across the River Tamar from Plymouth to Saltash Newton's Bridge in Queens' College, Cambridge, named after Isaac Newton Clifton Suspension Bridge, Isambard Kingdom Brunel's bridge over Avon Gorge, Bristol. London See: Crossings of the River Thames for a full list of bridges and other crossings of the River Thames. Famous Thames bridges include: