I have a Bailey Ranger 460/4 and repairing a leak after putting up with it for a few years. The leak is fixed and I'm re-decorating. However I can't fathom how to get the shower holder off. Looks like it comes in two halves, but not managed to price apart. Tried wriggling it up but frightened it may break. Any clues how this come off, it's obviously screwed in somehow.Doing my head in.