Severn Estuary Crossings

With its powerful tides and one of the highest tidal ranges in the world, the Severn Estuary was a barrier between two nations – until the Severn Bridge was opened in 1966, the only way to cross the Severn Estuary was by ferry or railway tunnel. In the nineteenth century Thomas Telford spoke of bridging the estuary, which at that time was too expensive and dangerous. Thus, the railway tunnel was b...