David Earl's character, Brian, was created by Earl himself before the movie. As fans of Earl's work, Ricky Gervais and Stephen Merchant asked him to play Brian in the movie.
Whitley Home is the name of the home builder on the billboard that Bruce and Snork vandalize. Whitley is also the name of the town (in Reading, England) in which Ricky Gervais was born.
When Julie asks Freddie where he'd like to travel, her globe is showing Australia then she spins it to stop on Africa. But as he chooses Cornwall, her globe is instantly showing Australia again.
Mr. Taylor: [to Freddie]
You've got no respect, and I've told you about it a hundred times. I know why you're doing it now, because he wears a suit, he thinks he's better than his dad. Well, that don't mean nothin' mate, and one day he's gonna come down to work at the department and he's gonna realize he's just like the rest of us.
Mike Ramsay: When you're selling life assurance, you want the stench of death in their nostrils. You're talking to the husband but you want the missus thinking "Crumbs, Chief! What's my life gonna be like when he pegs it?" Men work, women worry - that's what you rely on.