We have a family celebration overseas next term which we think it is important for our kids to attend. We're going for the minimum time physically possible - 48 hours - but that still means we need to miss one day of school. The HT has refused to authorise, saying she can only do it under "exceptional circumstances". As far as we can see there's no set definition of that term, and so actually she COULD do it if she wanted to. We feel really uncomfortable: we love the school, the kids are doing well, we support it 100% and now it feels as if we've been given something like an Asbo for one day of school....Has anyone come across a definition of what are "exceptional" circumstances, or examples where HT has authorised?