Isn't it 50/50 at the minute? I go to a private school, I'm not particularly concerned about it. If you and someone else are in a race, and you had a headstart, but finish at the same time, the other person would have won that race. Admissions tutors have to be fair, and oxbridge are always under a lot of scrutiny, so I'm not concerned.
If I earned that, I would buy a pool, pets, and a house in the countryside. WBU?