Only 40 per cent of disadvantaged pupils identified as high-achieving at the start of secondary school go on to achieve top GCSE grades, compared with 62 per cent of their more affluent peers, new research has found.

Only 40 per cent of disadvantaged pupils identified as high-achieving at the start of secondary school go on to achieve top GCSE grades, compared with 62 per cent of their more affluent peers, new research has found.