A pair of coots building their nest on Carsington Water. Their nest may be tethered to the bottom in some way but the essential feature is that it floats and that helps chicks survive. It's what coots do but unfortunately and with no wish to criticise the experts, this one seems a little flimsy.
We watched while they busily added a fair amount of material, mainly lengths of weed and and what appeared to be waterlogged oddments dredged up from the bottom. The whole structure never seemed to inspire confidence though - they climbed onto it very gingerly. Reminds me of government projects but no doubt they know what they are doing.