that sounds about right. even in places that should have experience in these things.
I did a foundation degree at a local college which I started in my mid 30s. no one on the course was under 18 and when a field trip was organized, the tutor came and told us that she had been told we needed to fill in parent's permission slips. A lot of it was ordinary stuff, confirming current phone number for next of kin, but the bottom was for parent/guardian to sign. I refused to get anyone to sign it. and refused to sign. At uni, the same kind of trip was dealt with through a sign in sheet name/emergancy contact number. all sorted.
the college also pulled a planned trip that would have required us getting ourselves out into a place in the middle of nowhere, because the only reasonable way to get there would have been to carshare, and they decided that was not allowable. we got quoted child protection legislation. we tried to organise it ourselves, but the place we were going would not deal with individuals, only organisations.