If they're trying to do this in the Severn they're mad. The Severn carries and awful lot of fine silt with its large tidal range and that will get in bearings and wear away blades.
Being underwater one won't be able to see how many are broken, and it won't affect their subsidies.
Absolutely....always been a mystery to me how Rommel & Monty were able to slug it out, with all those tanks & things & airplanes & whatever in the biggest sandpit of them all......and that in the forties! (Fe)
I think we've come a wee way since then...or maybe not.
In terms of renewable energy, if we are forbidden the alternatives, Tidal is by far the best bet. Either we try to find out if it works as imagined or we sit back & do nothing.
It is not too long ago that one regularly had to put one's 'heap' in for greasing lest the bearings wear out....today, with luck, they'll last the car's lifetime.....wow! someone must have done a bit of R&D.
EdCase: The Crusaders were a bunch of incompetent thugs somewhat worse than their opponents. What do you suggest for Muslims?...another Holocaust? I share your dislike of Islam but we should contain it where it belongs....in the desert from which it sprang &, with luck, its bearings will wear out