The link marked (here) kindly posted in #810 leads to an official BAA dictat on what is and is not permitted in the cabin. There is no mention, one way or the other of, cameras, CD Players, i pods, car keys with remote function or mobile phones. This is the offical line and I am still none the wiser! A much shorter version of the other vast link in that post is
http://tinyurl.com/jfkar