Check out the following site
www.futurastudios.com/atc.html for realtime ATC comms and radar displays and webcams at selected airports around the globe. Beware though don't let heathrow director catch you!!!
The subtlety is probably lost on you but I expect HD would have absolutely no problems with you listening to the ATC sites which are featured around the globe on that website. Now I wonder why that could be ??
