Thanks to everyone for the support, offers to help, transport, (toolkits) and all the well wishes!!!
I'm with you Rob - I did not plan to have it removed - or at least not for some time - but there is just to much metalwork in and around the knee joint - catching on tendons and othr moving soft tissue and it is preventing me from getting back to full strength - which means that I can't ride comfortably off-road (major decision making factor).
If it was just on a straight bone or was not bothering me, I would leave it in too, but I need to get rid of the pain and wierd feelings in my knees (which are often there, even when not reading the buttism thread) - so time to unscrew myself.