shouldn't worry about qualifications- just get the bristol database...
Basically, what you're saying is that you consider having a sound understanding of the subject material unecessary, because most of the answers can be found in the Bristol Database... All very well for getting your 14 passes, but I imagine that actually understanding the subject will stand you in better stead in the future..
As for the original question, most airlines only stipulate that you must have GCSE's, however I would suggest that at least A levels would be prudent. Some people decide to get a degree prior to training, some don't. One thing I would say is having a good sound academic background to fall back on may be advantageous in the event of loosing a medical, lack of employemnt etc.