Just watched the first 3 episodes of Last One Laughing UK, on Amazon Prime - pretty good so far!
Ten comedians are locked in a room for 6 hours, trying to make each other laugh while keeping a straight face - if someone laughs, or even smiles, they're given a yellow card - then the second time they're out of the game.
It's hosted by Jimmy Carr and Roisin Conaty - and the contestants in the room are Bob Mortimer, Richard Ayoade, Harriet Kemsley, Daisy May Cooper, Joe Lycett, Judi Love, Rob Beckett, Sara Pascoe, Lou Sanders and Joe Wilkinson. So, the usual people who crop up all the time on Cats Does Countdown and/or Taskmaster etc. but at least it's a different sort of format to the various panel shows etc.
Only problem is that the episodes finish really abruptly and instantly show highlights from the next episode before the end credits roll, which is a bit of a spoiler unless you're quick with the remote.
There are 6 episodes altogether, and at the moment just the first 4 are available to watch.
The format has also been done in Ireland (hosted by Graham Norton), France, Germany, Canada, Mexico, and several other countries, and surprisingly they're also free to watch on Amazon Prime.