Plans to deny student loans to those with lower A-level grades would hit poor families in regions where social mobility is already stalling, data obtained by Education Guardian shows. In the north-east a third of students who would be denied a university education come from the most disadvantaged backgrounds. Four months ago, the education secretary, Damian Hinds, launched Opportunity North East, a £24m campaign to raise aspirations and stop children in the region feeling they’ve been “left behind”. But the…