Amidst all the kerfuffle about Peter Hain's undeclared receipts, it was not noticed that the Welsh Secretary virtually confirmed that the government was committed to building the Severn Barrage. At Welsh Questions in the House of Commons last Wednesday, the following interchange took place:
Gregory Barker (Bexhill and Battle) (Con): What recent discussions he has had with the First Minister on the environment in Wales. 
The Secretary of State for Wales (Mr. Peter Hain): I have regular discussions, for instance on our joint support for the Severn barrage, which will be by far the biggest renewable energy project in Britain.
Note the "will be".
This in spite of significant opposition, summarised here, and before the viability of tidal lagoon schemes, as proposed by Peter Black and supported by Jane Davidson, has been assessed.