I'm considering getting one of those j.w. The thing is, I really don't like having the net there & it has to be really well sealed down or else the Moorhens find their way onto the pond. But then they can't get out again! (not the brightest of creatures...) & I have to rescue them. Incidentally, it doesn't show in my photo but the net is held up above the water by wooden spacers. Trouble is, it gradually stretches....or those water scarecrows that shoot water at anything that walks in front of the motion sensor on them..........................including you, lol!
Although they look cute (and their chicks even more so) they're extremely aggressive, quite vicious in fact, and chase all the other birds off. My two rather elderly chickens now hide way in the undergrowth.
The nest on the pond is just for daytime accommodation - their main nests are in my neighbour's hedge. Consulting the RSPCA is a good suggestion Becky - I'll give them a call. Incidentally, they're not a protected species and looking on the internet (thought I'd put that instead of 'net') there's a hunting season for them, and recipes!