HELP NEEDED PLEASE. I have a mira 88 shower (en suite shower cubicle). The dial (hot/cold / on/off) has been leaking for a few months now and I thought nothing of it until xmas day...whilst lying on couch I noticed on the lounge ceiling a brown water patch-directly underneath the shower cubice. Can anyone tell me how to get the dial thingy off? Ive pulled off the base of the shower and looked undrneath but its not the tray. It seems to be the pipes behind the shower wall....arrgghhhh help please