We need to do a v.long journey for a family event so are thinking of asking if DS can leave at lunchtime on a Friday. But what's the deal here? School are rightly very into attendance, but as he will be attending that day, can I casually ask his teacher if it's okay (he's only in Yr 1), or do I have to do the whole letter to Head thing? I don't want to make a big deal out of it unless I have to!