My DD aged 4 left her swimming class and went to the toilet unsupervised. It was a new teacher who made no effort to let me know she needed to go (I was sat on other side of pool watching older DD). As soon as I saw she was not in her swimming group I rushed around and another parent had found her very distressed in the toilet by herself. The manager on duty took an account of what happened and I've followed up with an email. He said that someone would be in touch. I've booked my DC in at another centre in the same chain for lessons from next week. For completeness, when I raised it with the teacher (it was the teacher's first lesson) she said she was busy watching the other children and that I should have noticed. As soon as I saw DD missing from the lesson I panicked (as worried she'd gone under) so it must have been less than a minute she was alone.
What sort of response would you expect and AIBU by taking my children out of that centre?