In the dream where Lolly is dressed up in shocking (no pun intended) pink, Lucy Gutteridge is wearing her wedding ring when Norman and Lolly inspect the block of flats, but not in the previous scene when they are in the office. Nor in any other scene in the programme.
When Norman Shenley visits the location of the house for a second time, he leaves his car blocking half of the road. Shortly afterwards, when he is trapped in the telephone box, the car can be seen to be parked in a different position clear of the road.
When Norman is being operated on, the crew can be seen reflected in the mirror of the surgical light.