The same case
Hi Peter PP,
I am exactly the same case as you. f-ATPL(H) and now going to f-ATPL(A). I am about to finish my PPL(A). I only have to take 2 exams (because I has passed the (H) interim procedure with Bristol).
We are both exempted from formal training. You could self study (the theory books is easy to find from people who have attended Bristol or Oxford) and use the ATP online question database. That's what I do and it is not difficult at all. Worth trying.
piravlos