here is a pic of the join- sorry for poor quality -can't really work the micro setting on the camera, but think you can get the idea.
mark, i hope i have done the splices long enough. the join is only about 20cm long with each piece of braid spliced into the other about 12 times?
will try go down to kingfisher and test the join on their machine some time soon.
thanks all, sparky.