2) Where are they now?

“One in 10 state school pupils will drop out of education before university despite having once been among the brightest in their class...” More Sutton Trust research http://www.independent.co.uk/news/education/education-news/tenth-of-brightest-pupils-opt-out-of-higher-education-846241.html the problem seems to be keeping disadvantaged students actively engaged in the education process, especially up to and beyond GCSEs. This is going to become even more problematic when the education leaving age is raised to 18. Possibly shedding some light on this problem, an article from the Guardian, which is effectively a detailed case study of a disadvantaged student who made it,
http://education.guardian.co.uk/schools/story/0,,2290865,00.html the analysis seems tough on parents but this is a recurring theme.