I knew this would happen. On my ML assessment a couple of years ago the carrying of mobile phones was still a discussion point now it seems you are criminally liable if you lead a group onto the hills without some form of electronic communication device. In my regular job as a teacher people regard you as irresponsible if you don't carry a mobile phone.
I've been going on the hills for a long time and I've always felt free there. Not any more.

By the way I think that marshals out on the fell should definitely use whatever they need to be in touch with base and if something even better than a mobile phone gets invented they should have it. marshalling/organising and racing are two very different things. The organiser is responsible for the marshals. Runners are responsible for themselves.