In one scene, Straker refers to Catherine as "Miss Ross" but her surname is actually Frazer. This is due to the character being named Catherine Ross in the original script and remained unamended in some pages of the final shooting script.
Throughout the series we are told that cars in the UK now drive on the right-hand side of the road (see "Trivia"); however, the road markings at the entrance to the hospital are clearly laid out for vehicles driving on the left.