Continuity mistake: When in the first pub and it turns out one guy is tee-total and will only drink water, there is a shot of the glass from the inside as the pint of water is drunk down to the bottom. In the next shot, from the side of the table, the glass has some in - around 1/3 full.
Trivia: In the 'Cornetto' trilogy, Timothy Dalton stars in Hot Fuzz, and Pierce Brosnan in The World's End. Both played Bond consecutively - there were six years between the release of Hot Fuzz and The World's End. There was a six year gap between Dalton's last Bond film and and Brosnan's first film.