I do believe definitions are going to be your down fall Geoffers.....as there is plenty of work for commercial licensed pilots....or for ATPL's that have gone "Bush" and do not maintain instrument currency as it is not needed and/or is not possible.
So...from your additional response....all you really care about is ATPL with Instrument Ratings....and relegate any other professional pilot ratings/qualifications/utilizations as being not germane to your interest.
Am I right in that perception?
It would seem you are taking at least a Euro-centric view of the Helicopter Industry world-wide.
I think what you are really trying to say is...."Are non-UK...Non-JAA licensed pilots competent?"
Are you going to pull out the coloured pencils and start giving lessons here?