At the end of school.
We have a ten minute walk home and he is always bursting for the loo when he comes out, so was one of his classmates today. He was near wetting himself by the time we got home.
DS says that the teacher won't let them go apart from at break times. AIBU to think that this is harsh, especially on 5 year olds who are constantly drinking from water bottles all day. I was thinking of having a word about it.