Entry to a BAeA beginers day will probably qualify.
Will it really? As I understand, you can participate in a beginners day with no aerobatics experience at all, and no solo endorsement and/or BAeA proficiency card, as it's possible to fly with an experienced instructor all day.
I would assume that the aerobatics rating would, at a minimum, be at the level where you should be able to fly the BAeA "beginners" sequence solo, safely. And that, in turn, will require that you've completed something along the lines of the AOPA Aerobatics syllabus, or the lesson plan that's in Robson, or something similar.
I don't mind an aerobatics rating per se, provided the following:
- A sensible grandfathering scheme for those currently proficient
- Sensible entry requirements for the course. 40 hours PIC after license issue? Why?
- A sensible syllabus. IME, about eight lessons are required to fly a typical "basic" sequence safely.