well here it the public advice to doctors about child protection.
which is worth a read
no I dont want to kn ow more details
first of all ask the school as you are the parent
then if they say no
say they are obliged to act in the childest interests as a matter of law and can they consider if they are?
if still no - then ask if you are named in the notes and if you are you have a claim under the data protection regs as docs with your name in, are your data
have a read of this = more MDU
https://www.themdu.com/guidance-and-advice/guides/children-whose-parents-are-separated?Region=England
and it looks as tho you have a legal right to them