In a friends school I know of the union put a survey out about bullying. The survey showed many problems and anxieties amngst the staff. Before the union was about to formally tell the staff the head withdrew it. the head said he would do a joint survey with the unions but the results were exactly the same - very damming. Needless to say the head didn't allow that one either to be shown to the saff formally; the staff also assumed the governors never got wind of it or even saw the 2 surveys.