babble, you are correct as far as UK National licences go. However, the JAR professional licences do not automatically include an IMC rating as do the UK National licences. The holder of a JAR ATP(A) with a multi-crew instrument rating would have
no IFR privileges in a single crew aeroplane.
It is possible to add an IMC rating to a JAR professional licence for use only in UK airspace by taking the same Skill Test and periodic Proficiency Checks as a PPL holder.
http://www.srg.caa.co.uk/documents/s...date310800.pdf