not sure who said it but it was someone at one of the energy companies...said if we had tidal done around a big portion of the UK, that would give us enough power for the UK and more for life...yes it will be expensive and mixed with other forms on top, but the cost alone would be not even half the price of building a nuclear power plant, plus we could start building it today, its 100% reliable cuz if waves stop, then we're long gone already...i think they said the cost of one nuclear power plant could give us 1.5 the amount of power we need with tidal. Its a no brainer really, for nuclear you its 15yrs minimum till its built, Climate can't wait that long and for something that its only going to cover a small overall percentage of power for the UK, where its tidal can power the entire country.