Sign Language Interepreters for Parents in School Meetings

hello all,
A friend of mine, could really do with going into their daughters school, and having a face to face meeting. The problem is I think the school havent been very forecoming regarding providing a Sign Language Interepter.

I was just wondering if I someone give me some advise, are the school under any legal obligation e.g the Equalty Act to provide a intepreter?

Thanks in advance