Originally Posted by potkettleblack
...the IR test can only be undertaken with a UK examiner...
This is incorrect. The JAR-FCL CPL LST must be undertaken with a UK CAA FE if the ATPL/CPL TKC is undertaken via a UK groundschool (some exceptions exist..)
Secondly the UK CAA is disinterested in logging complaints about serious losses of quality in flight training offered by other JAR FTOs.