I seriously love this idea for the downstairs loo. You could create a screw or catch at the end you can't see in the picture so it is easy to remove from the wall and put on a toilet roll. They do artificial birds at Rockett St George.
I have several of these (well, similar) pedestal standing birdcages as they were packed with fragrant herbs and flowers as table centres at our wedding. One is in my bedroom as a jewellery and earing stand but I'd love to fill another with artificial flowers to stand on a table in the dressing room.