Thanks. I'm not sure where the bike came from it was my mother in law's she won it in a competition and let me have it when I had to move house.
the rear gears don't wobble a slight amount they proper move and tilt. Can I upload video here? I can take a vid. I checked my son's bike and another mountain bike and the rear gears are solid and don't have any play yet mine appear definitely damaged. I don't recall noticing this before today.