The 'trousers and nothing else' scene was hastily re-edited before the film's original release to get rid of all but the barest glimpse of topless nudity and thus avoid an AA certificate. The new UK DVD release by Cinema Club reinstates the original footage.
Two versions of the plane recognition scene exist. On the 2001 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.
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