The new teacher will not let you go to the lavatory during class time. At all. but if you must, then you lose "Golden Time". In my view this is being punished for answering the calls of nature and there are many implications. Golden Time is 20 minutes on a Friday in which you can do anything at all in the classroom and is much loved by all. Its a class of 9 year olds. I expect it is a bit annoying to have your teaching party piece interrupted but if the children are working in groups or on their own, I don't see the problem. Any views on the matter would be appreciated before I take it up with the school.