To be honest, with the English exam system the way it is and so many people getting top grades, I think the universities put a lot more emphasis on the personal statement. They must get loads of candidates with top grades so you really need something extra to make you stand out - just cos you got fantastic grades you're unfortunately not guaranteed a place. It's a shame that the exam system works that way - if it worked properly then getting top grades should be a pretty good indication of excellent academic ability regardless of what type of school you went to, but sadly that's not the case so the universities have to set a sort of minimum level they want in terms of grades and then take into account loads of other factors - like work experience, extra-curricular activities, etc. And the knock-on effect of that is that people such as yourself get excellent exam grades but can no longer pick and choose which university they'd like to go to.
Jenn xx