b1g-fragment02 1378
The dissemination of information in the event of an incident is dealt with at three levels : the first is the normal system of press notices ; the second is the use of teletext and viewdata ( Ceefax and Prestel ) to get direct to members of the public at their homes or places of work ; the third is the use of Telecom Gold electronic mail to get more technical details to various official bodies , such as water authorities ( Jackson 1989 ) .