So, how did David Cameron do on Letterman?

David Cameron was welcomed on to the Late Show by host David Letterman to the tune of the house band playing Rule Britannia and dry ice pumping into the studio to replicate a London fog (Reuters)

After Boris's barnstormer on Letterman's Late Show in June, the Prime Minister David Cameron had a hard act to follow when he appeared on the same talk show last night.

Letterman gave him a pretty esoteric quiz of British general knowledge. Dave failed, incorrectly naming Elgar as the writer of 'Rule Britannia' and he didn't know the English translation of Magna Carta either. But he did know his stuff when it came to Texas and Nebraska. What does that say about our national self-esteem?

He also got in a good boast about Britain's superior rules as regards campaign funding.