By forcing users to sign in via , the BBC can verify that the viewer has a registered account. While they do not check every viewer's license status in real-time during the sign-in process, the account system creates a clear digital trail, making it easier to enforce license compliance compared to the old "honor system" of aerial broadcasting.

There is also a security component. It prevents users from staying permanently signed in on shared devices, or makes it easier to sign out if you are using a TV in a hotel or a friend’s house, without having to navigate complex settings menus on the TV.

: Open the BBC app (iPlayer or Sounds) on your TV and select the "Sign in" icon.

Maya lunged for the power strip. Her hand touched the switch just as the screen refreshed. The hundred feeds vanished. Replaced by one.