Most ridiculous thing I've heard in a while is that near where my Mum lives in Cardiff is a massive reservoir. They now want to fill it in and build houses there
Personally, I would have said that we need more reservoirs, not less. Shouldn't matter where in the UK they are, they can be used to gather water to be transported to wherever needs it.
Maybe they could turn most of Shepton Mallet in Somerset into a huge reservoir. It seems to rain more there than anywhere else I've ever been!