i have moved twice due to carp SMT (primarily new heads) in both cases they were out within a year of my givng up on them. If you like the school, consider keeping your head down and see how it goes. All schemes have good and bad bits, so maybe it won't be as bad as you expect. The shouting down person is a *** who will eventually show themselves up and fade away (or get promoted away) so give them time and rope to hang themself! if they invite you to a meeting use your right to a friend sitting in.