I doubt Nate is worried
I saw that programme and it looked like a nice jolly for Nate Silver, paid out of our licence fee, that didn't really mean very much. He chucked in a few caveats regarding the info available here compared with the data he uses in the US, but he was definitely out of his comfort zone.
However I shall certainly be looking at fivethirtyeight.com as the contest hots up over there.