They called it "Camulodunum", from the original Celtic Camulodunon. Which I think is a pretty darned mean difficult question to ask a team ;-) So it's good that they could get away with saying anything that sounded vaguely believable. Is that the first time Km employed the "if they don't know the answer, you can say anything you like" device that was so over-used in later series?
Search engines are wonderful things, eh?
Yup, I think this was the first instance that it was used - predating series 7's Brollochan by three seasons.
I must have missed bits of series 7 and 8. I definitely saw one team die on Play Your Cards Right, but I've no memory of the brollachan. Hopefully Challenge will get there before too long...