Thank you all for your advice and help. It was truly stuck and it took removing the tank, panniers and laying the beast on its side and persuading the bolt out with a sledge hammer and drift. I honestly thought I'd have to cut through the swing arm at one point, but after a n hour of whacking it came good. The next problem was removing the old bearings and bushes fro the swing arm. Again pulling, drifting didn't avail. So I paid for them to be spark eroded out by a local engineer (machining hardened steel is tough at the best of times). Curiously though the bushes I thought should be brass turned out to be fibre. I'm replacing with brass now and all bearings, bushes etc. What an absolute faff, but hopefullyvafter the parts arrive next week I'll be up and running again. My bad for not greesing the bearings often enough, but I can't help but think it's a bit of poor design.Lesson learnt. Thanks again to all who replied. I'd been truly stuck.otherwise.