London boroughs
The introduction of comprehensive schools, directed by Circular 10/65 in 1965, was mostly followed in Greater London; however, 19 grammar schools have been retained in some Outer London boroughs, with Sutton having the most with five, followed by Bexley with four and others in five other boroughs. In these boroughs the state schools outperform the (relatively few) independent schools. In inner London, private schools always get the best results and are larger in number. At GCSE and A level, Outer London boroughs have broadly better results than Inner London boroughs.