It comes after a separate study found children with birthdays in the summer are more likely to be unhappy at school, have low self esteem and are less likely to be accepted into top universities.

Children who struggle with numbers are also more likely to be boys, much more likely to qualify for free school meals, to have Special Educational Needs, to speak English as a second language and to come from an ethnic minority background.

But with a short but intense tutoring scheme struggling children can catch up with their peers

After just 3.7 months of support, the children made average gains of 15.7 months.