[VMPhil]

They're mostly live aren't they so they can't just switch to recorded programmes, especially if the products being marketed have changed, are no longer available, or offers they're talking about are no longer available etc. Plus they won't have had time to check for what may have been harmless chatter or banter but may be perceived as insensitive or offensive after a major event like a royal death. I imagine it's easier and safer to close down for the day and put up an in memoriam slide.