It's a Royal Knockout

Thanks to a TV special on the most embarrassing moments of the '80s that I caught the end of while in London, I can finally put a name to something I saw on TV as a kid that has to be seen to be believed: It's a Royal Knockout, also known as the Grand Knockout Tournament. Imagine Prince Edward, Prince Andrew, Fergie, and various celebrities chasing each other through the mud wearing giant vegetable costumes and things along those lines and you'll get the idea.

Sadly, I have not yet been able to find any photos of this online, although apparently there is a commemorative book and board game.