My three were Paul Durkin, Glenn Turner and Mark Warren. I'd be surprised if at least one of them wasn't pointless.
I had a go at the rugby referees but I think I was either off in the timing or they scored points, if indeed they've refereed at the 6 Nations. I went for Paul Williams (?) and Nick Berry.
But if I'd been on the show I think I'd have kept it to football.
I don't think they could have been much more specific. Even as a very casual rugby follower, I think Nigel Owens is pretty high profile but these rugby fans couldn't name him and he only scored 10. It's probably the sort of thing where if you could get beyond the most obvious answers, such as Poll and Webb for football, you'd have a very good chance of scoring a pointless answer. If I'd been on the show I think it's definitely the sort of category it would be wise for me to go for because even though there's plenty I couldn't name it's the sort of subject where having a reasonable level of knowledge is likely to lead to success. There's probably other categories I might know more about in general but would be less likely to get a pointless answer as my knowledge wouldn't necessarily be greater than the average person.
I was also thinking of Hugh Dallas given the UK angle - did he have any Scottish ARs with him? I can't recall that.