Tourist, yes, you're absolutely correct - my error! The Be200 is indeed on the list of 'recognised multi-engined aeroplanes', so the theoretical knowledge credits of LASORS D3.3A do apply to qualifying King Air captains - only a pass in Air Law is needed!
Herewith my corrected statement:
Once you have met the 2000/1500(500) requirements, you will then need to pass the ATPL(A) exam in Air Law. You would be credited the RT theory exam and practical test and, if you have at least 500 hours as a pilot on multi-pilot aeroplanes, would also be credited with the Multi-crew Co-operation Course. If you are still in current flying practice when you pass your exams, you should be exempt the CPL Skill Test, but would be advised to fly a civil IR on the King Air - you would then be able to open a CPL(A) with a Single Pilot IR and Type Rating for the BE200 series and would hold ATPL(A) knowedge credit.