Environmental arguments never stopped London getting their none generating barrage did it - No because there was a vested interest for the politicians so it got built.
Doesn't matter how you wrap it up theres a massive hydro/tidal opportunity not being used and whatever the negatives of such systems are they are a whole lot better than CCGT's coal fire power stations and nuclear.
Whats the environmental impact of the last 60 years of nuclear power generation ? How can they square the environmental argument of the yet to be built long term geological repository for nuclear waste ??
The reality is its easy to build easy to maintain and easy to replace tidal barrage equipment - the main issue is its a big outlay and long return on investment and the conservatives don't do investment they expect others to do it for them and because its along payback there's not much chance of a kick back is there.
Well that's my rant for the month over and I feel SOOOOOO much better thanks

Moxi