Not sure how a Saturday Night Takeaway could run without an audience.
They could show The Men in Brown, Get out of my Ear / Ant vs Dec, End of the Show Show & do Win the Ads via Skype?
All wrapped up in an hour.
I think if there was just one or two shows left in the series they could probably get away with doing it without an audience, make some jokes about it and make a fist of doing most of the features. But four shows is a stretch and a half.
Most other shows will probably manage OK. The likes of The Voice, any gameshows, talk shows etc can do without an audience if necessary. Question Time could be a bit stuffed although I guess again they could have questions via Skype or submitted in advance.