I'll have a word with the other people nearby if they've had any problems with foxes, the amount of rabbits around here should keep them happy though, but i'll source some other mesh if needed. I was worried about the spacing of the perches too I'll see how it goes and then have a look when they settle, I'll trim the shape too as it won't be difficult to do with the branches.
Cheers for the advice from you all, looks like I'll be busy in the next week or so.