You seem to be making a mountain out of a molehill."Sam Dobin, the director of sixth form at Brampton Manor, said: “Every student here goes to university. We have a very traditional approach with no gimmicks or shortcuts.""
From the link in the original post.
This school is now a 6th Form College - only.
The story gave the impression that Brompton Manor is doing amazing things with local kids in its deprived catchment area when the reality seems to be that its pupils, creamed from a catchment area of more than 100 square miles, would be capable of achieving Oxbridge entry without attending this particular school. This school does, however, seem to have a means of introducing pupils (via the Oxbridge graduates) to the Old Boys' Network to secure an unfair advantage in the Oxbridge selection process.
My local sixth form has an area of over 300 square miles and also gets 99% a level success rate with 25 of the 28 courses getting 100%. It is normal in rural counties to travel over an hour to college and does course problems for any extra curricular activities as the bus service can be very bad to outlining villages (hense JC commitment to give free travel to under 25s was total bollocks). They are in the top 25% of the country.
I do accept that they are biging themselves up and a lot of similar schools/colleges could do the same. Someone probably twigged that using the school address and its place on the prosperity ladder would get their students an advantage.