Ironic that Chris Smith should oppose the Severn Barrage at the same time as he admits that the EA is going to let the sea invade the coastline of the UK. One of the virtues of the Barrage is that it will protect the whole of Severnside (including towns and cities Like Newport, Cardiff, Gloucester, Bristol Portishead and Weston-super-Mare) from flooding as sea levels rise if we fail to check global warming. Also a couple of nuclear power stations. Oh, and the Slimbridge wild fowl reservation.
Also, wave barrages off the coast of vulnerable places like Norfolk could protect the coastline while producing valuable renewable energy.