Theatre Fire?

I remember visiting a cinema - tech visit - in UK when a lad - and they said they would play "Three blind mice" sublimely over the PA if there was an emergency pending - this was post wartime. This was heard by the ushers and cinema staff who would take planned action.......... Bringing matters up to date AS 4801 is a Standard for OHS and includes a requirement for emergency evacuation to be documented and drilled....... On the subject of OHS practice I read in the Australian Model Engineer publication that rulings for OHS are being revised for organisations that will include community theatre. This is to take place next year I hear tell. OHS is not understood by many especially in the "amateur theatre" world and where we are managing the GP there is a duty-of-care onus on managing their safety in venues... Peter