I have a few... ok perhaps that's an understatement
I think the 12 ft/lbs limit is the issue in the UK, everyone wants guns that run 11.9997 ft/lbs... and a 50 won't do that.
Worth a lot more money in Germany, where the normal 8ft/lbs, perhaps 10 ft/lbs during a concurrent solar and lunar eclipse, well over the "Frei" (licence free) limit of 5.5 ft/lbs but still "Frei" because they are old, makes them very desirable.
Older ones even the very simple "E" models are very elegant indeed, there is a particular purity to their lines and simplicity.
**WANTED**: WEBLEY PATRIOT MUZZLE END; Any Diana/Original mod.50 parts, especially OPEN SIGHTS