Last academic year it was fairly evenly balanced for all ages 7-10. You can see exact numbers in the school census zip file SFR21/2013, the file that counts pupils by age rather than national curriculum year.
Hello Just seen this and to reassure you, there are equal numbers of boys and girls in the junior school. I am not sure about the seniors but going forward, numbers are even and it is a top priority of the school to balance these out. I have 2 children there, a boy and a girl, both absolutely love this school and especially the inspirational teachers. I hope that helps.