I was bitterly disappointed when 15-1 came to an end, and for some reason Channel 4 replaced it with this. Obviously the time slot of 2:45PM is still allocated to a quiz, so why not keep The G Man (William G. Stewart) in that half hour.
Anyway, onto Beat the Nation. In comparison this is a bit lightweight. You can read the other comment to get the gist of the shows details. It seems to be designed for a wider (dare I say it, more common) audience. The questions are easier and there are fewer of them, but you do get a few laughs here and there. The presenters, former Goodies, keep the humour present at most times, and you are surprised at how little the general populace knows.