Thanks,
I have a new Regina freewheel in the post from Hilary Stone.
I will return to this blog in tears, looking for everyone's help again if I still have a jumping chain.
Re:
Thanks Colin. My hub is threaded not splined. The freewheelcomes off the hub with a socket with two dogs. In other words a peg spanner I have added a photo. I live in Fleet Hampshire. If you are not to far away I could visit?? Cheers Phil