Bridges in the United Kingdom and the Isle of Man is a link page for significant road bridges or footbridges in the United Kingdom. Significant railway bridges are listed under List of railway bridges and viaducts in the United Kingdom.Significant canal aqueducts are listed under List of canal aqueducts in the United Kingdom.Wales•, • • Bridge, carries the M4 over the River Neath south of the town of. • • •.