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Questions are bring raised about the attainment gap between those educated in state schools and those in the private sector.

Yesterday's A level results showed that a startling 70% of pupils at fee paying schools got A or A* grades compared with just 39% in comprehensive schools.

And the gap in achievement which has always existed got wider. The question now is why – and what can and should be done about it

Nick Robinson spoke to Sir Kevan Collins, the former education recovery commissioner for England – who resigned in June – but first to Kate Green, the Labour party's shadow education secretary.

(Image, queue for exam results , Credit EPA .)