I know EGLC only from FSX and videos.
Devices, camera:
Now I think the same. And also that the people are listen if something important is to say during an emergency. If you listen to your mp3, you hear nothing...
I got a message from a friend, he has experience as a real pilot and is ATC in training. He said the only thing a camera or a mobile is influencing is your magnetic compass, if you sit in the cockpit close to it. And nowadays aircraft are not flying alone with this we know.
I got this fear, because I had an experience with SAS. They are really strictly controlling this.