my current experiment is to resit an a -level i did 10 + years ago. Whilst the content hasnt changed the modular format does make it easier to study and do the exam. I have done 2 x 1.5hr exams with 8 q in each paper.
I think the first time round it was 2 papers in the 2nd year 2- 3hr each maybe. So far my results are well up on first time round.