This is a fire safety notice in a computer lab in Trinity. Note that unlike the fire safety notices in NUIG, it is in English. :)
First off, I suspect the author didn't really mean that the user should break the fire warning switch; that sounds less than productive.
You are allowed one quick attempt only at putting the fire out either if you have been trained or if you are trapped by fire. If trapped by fire and the initial attempt fails, please give up, and be burned to death. Thank you.
When you hear the alarm, you must collect your handbag, coat and etc. All students should carry a handbag and coat for just such an emergency.
Please close all of the imaginary windows.
Report to your assembly point, the railway car-park. As the railway car-park is currently occupied entirely by a nearly finished sports centre, you may need to break the glass in the doors and so on to get in.
While 'G. H. H. GILTRAP' looks like one of those mysterious academic acronyms, it is actually somebody's name, it seems.