I found this online about the new GCSE levels and thought others might be interested:-
grade 9 will be highest, at a standard equivalent to the current top half of A*
grade 7 will be equivalent to the current grade A
grade 5 will be linked to international Pisa tests
grade 4 will be equivalent to the current C grade
grade 1 will roughly cover current F and G grades
Here's the link:www.aqa.org.uk/resources/mathematics/gcse/mathematics-8300/plan/changes-to-grades