I don't believe any have ever been registered in the UK, although I have an idea Alan Mann Aviation at Fairoaks may have been appointed distributors for a while in the 1980s (along with the Merlin and Metro). I seem to recall a couple of US registered examples parked there on several of my infrequent visits.
The prototype had Astazous slung under the wings on pylons, a rather odd configuration!
Nice looking aeroplane.