A government minister has cast doubt on whether the proposed Severn barrage should go ahead.
A private consortium wants to build a £25 billion barrage between Weston-super-Mare and Cardiff, though it would require government support.
Hafren Power claims it could generate 5% of the country's energy from the tidal power harnessed.
But today the Energy Minister Greg Barker MP told MPs more work needed to be done to establish the costs and impact it would have on wildlife and the port of Bristol.
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