Quote Originally Posted by William Chitham View Post
...I've been looking for adaptors without luck so far...
William.
Have you tried these guys?

HL060023 is two stage FabMaster Elite Reg 2 Gauge Propane 2 Bar (0-30 psi).
Advantage of this one (assuming it is available?) is that it would come with UK fittings.

Quote Originally Posted by William Chitham View Post
...I notice that the Harris reg recommended by Will Neide is available in various ranges including 0-15 psi...
William.
Harris regulator is a single stage...
Neither you nor Bill mention the size of propane bottle you are using and I am sure Doug is right that "...twice the size of an American BBQ tank..." (whatever it is?) is probably easier on the regulator than tiny 3.9kg bottle.