Two versions of the plane recognition scene exist. On the 2001 VCI/Cinema Club DVD, Patrick Mower's ad lib "No, but I know a Fokker when I see one" is used. This was removed prior to the film's theatrical release in favour of a different take featuring the scripted response "well, Bristols usually come in pairs" in order to get to get a lower certificate. The Bristols version is the one used on BBC TV and the later 2003 Special Edition DVD release included both versions.