The film was primarily shot throughout 2004 in London . The shoot occurred swiftly , with a particular set of 20 minutes of screen time being shot in six hours . As a result of the 2004 Madrid train bombings , the team found it difficult to gain permission to shoot the film at an airport . Eventually after failing to convince officials at Heathrow Airport and Gatwick Airport , they had to settle for filming a sequence at Leicester Airport
2004 Madrid train bombings
2004 Madrid train bombings
Ramji Londonwaley