HI Tom,
Thanks for your reply regrettably I work on a Site which doesn't allow any radio's, phone's or Bluetooth devices. I think we will need to include on induction and annual Fire Fighting Training that individuals on finding a fire during maintenance raise the alarm and continue to raise the alarm until the reception announces an evacuation. It was more hope that someone had a Gem of information that might help.
Ill try the link you suggested.
Thanks again,
Gary