Brenda tells Regan that the robbery will be "somewhere in Covent Garden" but not at Foss's jewellery shop. However when the robbery takes place and Regan beats up Kenny Jarvis, a sign "Arnold Foss & Sons, Jewellers" is visible.
Early in the episode, Regan is complaining about only being able to afford a holiday in Eastbourne and a second-hand car, but later on, he has an "M" reg Ford Capri, which was new in 1974, when the episode was filmed.
When Detective Sergeant Carter says that he is going to check the value of some jewelry, Brenda states that it is 700,000 pounds. When she does this, her voice does not match the movements of her lips.