When Worricker and Margot are playing chess, the chess board is set up incorrectly. There should be a white square on the right edge of the board as they face it. The placement of the pieces appears randomly placed.
When Johnny Worricker walks towards the ferry then off the ferry, he casually carries two cases of wine in his left arm. The wine alone would weigh approx 18Kg (40lbs) not to mention the bottles, but the ease with which he carries them suggests that the cases were empty.