Continuity mistake: In the scene where Sam has just been clipped by a car in the first episode, Sam is rolling off the car with the car rear in this shot, however when we cut to an overhead shot of the car, Sam is seen to be rolling off the car AGAIN before he hits the floor.
Continuity mistake: When Sam and Gene enter the pub with the T.V., they both stand at the bar with Gene leaning one hand against the bar. In the next shot Gene is leaning on it with both hands. When the shot cuts again he is back in his original position with one hand on the bar.
Continuity mistake: Sam and Gene are discussing how to deal with Stephen Warren and having a drink. Sam holds the bottle of scotch with the label facing away from him. It immediately does a 180 degrees turn as he takes a slug from it.
Continuity mistake: When Gene and Sam are having a discussion in the gents, his tie goes from being lopsided to straight, despite his hands never leaving his pockets.
Chosen answer: Sam is using the modern wording of the right-to-silence caution prescribed by legislation such as the Criminal Justice and Public Order Act 1994. In the 1970s, the wording would have been different, if it was used at all.
Sierra1 ★