Indeed the FRA did. I drafted it.
As I recall mobile phones were not raised at the relevant FRA Committee but there was a debate on the definition of waterproof rather than windproof and what is "full" body cover.
I did Edale in 2007 and I have raced in even worse conditions.
However whether or not I think carrying a mobile phone is sensible, as a race organiser my start point is that the race organiser is always right. It is his race and if you don't want to play by his rules then don't play at all.
Btw there are now approaching 7000 members of the FRA. The days that Wheeze likes to wax poetical about are gone or going. Fellrunning isn't a fringe pastime for a few hard men who build dry stone walls and have sheep anymore.
Welcome to the real world of the 21st Century.