Thanks all for your help tonight. A hard way to learn from a school boy error! I've been patched up - nothing more than cuts and bruises +, unfortunately, a slightly dislocated clavicle. It may settle into place when the swelling goes down, otherwise it will need some intervention. I have an appointment with the specialist on 8 May to assess it. In the meantime, some enforced rest! Thanks again to everyone, especially Steve & Mark.