As I sit here and ponder on life in general (and what the wx will be like tomorrow morning) I think I must have done the 'CAA UK' CPL(H) exams back in 2001 which didn't include Perf A but did include the Helicopter Technical paper. Although hydraulics and pressurisation weren't on it IIRC. Hence the 13 exams.
The 7 IR(H) exams must have been JAR though beause that was only two years ago.