Crew and camera are visible in a mirror when Wanda visits Archie in his office for the first time.
Archie's pants are visible when he is supposed to be nude (video fullscreen versions only).
Path in cement before the cement roller has been there.
The wedge that Ken shoots out of the pulley was inserted from the wrong side, so that the weight on the rope would have loosened it rather than it holding safely.
When Otto fires his gun on the safe in the hideout the gun makes the sound of a silenced weapon, but his gun is not equipped with a silencer.
The garage with the safe is in an archway under a very wide railway viaduct. But dialogue between Wanda and Ken places it in Fulham, which has no such viaduct.
The flat that Archie borrows has an E1 postal address, putting it on the north side of the Thames, but has a view of Tower Bridge from the south side.
Wanda is in a car putting on red lipstick. After a cutaway and return to Wanda in closeup, she is wearing bright pink lipstick.