paco - thanks for the confirmation. I'm aware of the Perf one, if nothing else I understand that this one is much better sat under old syllabus.
I've checked with documentation out there, seems that for fixed wing,
Aircraft General
Instrumentation
Radio Navigation
Operational Procedures
cannot be carried forward old syllabus to new. There appears to be benefit in sitting Performance in the old syllabus and possibly also Gen Nav. That said, from what I understand, some of the updates for the new syllabus are for the positive.