A study suggests that where children grow up in England has an increasing impact on how well they do at school. <br />The Social Market Foundation examined test results and found that regional differences have become much greater. <br />Pupils' results are highest in London and lowest in Yorkshire and Humber. <br />The former leader of the Liberal Democrats, Nick Clegg, is chairing a commission on inequalities in education and said part of the problem was attracting and retaining good quality teachers.
