All at sea [tidal power]

Being an island nation regularly feeling the force of the Atlantic down its western coasts, the UK is well placed to harness tidal and wave power. The largest single potential source of tidal energy in the UK lies in the Severn Estuary, where the tides are the highest in Europe. Developers believe a barrage built across the estuary could provide as much as 7% of the power needs of England and Wales. There are concerns, however, that the barrage could have a negative impact on the existing habitat and wildlife. Alternatives to the barrage have been put forward including the installation of tidal lagoons which would have a significantly less environmental impact than a full-bodied barrage.