Forks separated now (S600 not S200!), I managed to undo the nut whilst the forks were compresses (thanks for the help). Dampers were fidly to get out as one of the circlips is a way up the tube, in the end I had to grind down an old thin scredriver and put a bend in it then hook the eye of the clip. I'm thinking of having the tubes straightened and re-chromed but have also asked the people at Greeves for a price for replacements if they will supply them (assuming they fit). I'm just waiting for a reply. They supply a whole new fork but sadly its out of my budget for the rebuild (£595 without yolks).