I have recently been looking into this too, I'm struggling to keep up with the various certificates here and there. Especially as a few of my quals have been completed at work rather than at school. I found these links which were helpful, not necessarily for ballet but in general.
Educational levels https://www.gov.uk/what-different-qualification-levels-mean/overview
And
RAD Ballet exams as UCAS points https://www.rad.org.uk/achieve/exams/Results,%20qualifications%20and%20recognition/ucas-points
Potentially other syllabus' have points too.