Very sad news about Mike. Feel for Jackie, can't begin to imagine how devastated she must feel. Whatever your level of first-aid training, out on the fell you're very limited as to what you can do.

Whatever one's view of modern technology, one vital piece of equipment in this sort of situation is a phone. The ability to give a good location description is vital too, saves a lot of faffing for the rescue services. I take mine with me when I'm on my own, so running in a group shouldn't change that.

TF