Although the boys' holiday is set in Malia, Crete (Greece), the majority of external filming took place in Magaluf, Majorca (Spain)- with any signs mentioning the true location covered up, removed or replaced.
When the boys are in the coach on the way to the hotel there is another group of lads singing a "We Love You Burnley" football chant. When they get to the hotel the man they meet clearly has a Blackburn Rovers tattoo. The two Northern teams have one of the most violent and longest running rivalries of the game.
Jay's dad says to Kevin Sutherland (Neil's father), 'Alright, who's this then, the vicar?'. Kevin, who is played by Alex Macqueen; previously played a vicar on the IT Crowd (2006), episode Return of the Golden Child, and also the local pastor in Hunderby.
In the scene during the drive to the airport where Simons dad Alan is driving, he mentioned that he went on holiday to Magaluf when he was younger. The hotel scenes and resort scenes were shot in Magaluf.
James Lee Hunt, Sam Sheriff and Tom Wells got picked out of over a thousand applicants to play James' friends. Another guy named Chris, was originally picked, but it was seen as a better option to have three friends instead of four. However, he can be seen as an extra in the club scene which James and his friends feature.
Originally, Mark Donovan; who bullied the Inbetweeners in the TV series, was to have a larger role in the film where he would follow the lads to Malia, but the writers couldn't fit it into the script so the idea was scrapped.