BGS
I would agree with the above post for sure.
At the moment, I don't think you could find anywhere better than Bristol Ground School.
They got me through them, which is no mean task.
The instructors there are second to non, they know exactly what you need inorder to pass the exams and they do away with the rubbish. You only have to look at their notes 7 files instead of the 14 you no doubt get elsewhere.
I would highly recommend them to anyone.
Good luck who ever you choose.
Cpt. Chaos