Actually liquidhockey, you still CAN do you A-levels. It's called evening classes or nightschool, and the level of teaching is generally as good as or sometimes better than that at school.
Two friends of mine, a mother and daughter, both successfully did an A-level in an academic subject in one year at night school. The mother had never passed an exam in her life; the daughter was only 16 at the time.
---PPRuNe Dispatcher