I won;t lie; DH ahs history with this bloke, DH couldn;t arrnage childcare for Lecturere's change of class times at zero ntoice (or even a years tbh) so lecturer wasn;t allowed to schedule the class hours he wanted (until 9 so he could go home early on a Friday). Then DH was ill and got an extension on an essay which lecturer din;t like either. plus DH found he'd been downgraded by said Lecturer from a fellow student that lecturer had told and frankly, they're not mates.
But DH is currently locked out of classroom, and has been refused admittance. What can he do, if anything?