This may have been posted before, in the 95 pages of this thread. The "Richard Littlejohn Live & Uncut" clip from LWT, where some unsuitable content (!) is switched to air - not knowing whether LWT's Pres Desk was mostly hard-wired sources, or whether VTs
and studios were assigned to the desk as Outside Sources, I don't know quite how this would have happened.
The Announcer, Peter Lewis according to the comments, sounds as shocked as the viewer would have been.
I first saw this on the 10th Birthday 'Worst Cockups' LNN party tape, which has long-since been taken down from YouTube. There were some crackers on that.
It's on YouTube, and is NOT SAFE FOR WORK - put "TV Takeover Sex clip on Live ITV Night time show" into a search on YouTube and it should be there. Not posting a link to it.