The news I've got is that Turkey is adopting "emergency measures" which, I guess, is subtly different from "state of emergency" which is a situation of national danger or disaster in which a government suspends normal constitutional procedures in order to regain control. RTE would, I am sure, say that he is control of the country but, nevertheless would be very happy to suspend constitutional rule for a while, or longer, to lock up the 50,000 people so far targetted. If he did declare a state of emergency then it would surely require the FO to consider their advice very seriously. If a few/many UK citizens were killed after FO advice that it was safe then it would come under considerable criticism