11.   Some patients are anxious that their neighbours should not know that they have hospital appointments, and therefore prefer an unmarked car to an ambulance.

12.   The cameras are installed alongside the rear view mirror in five unmarked cars across Merseyside.

13.   The specially-adapted unmarked cars will be compared on a day-to-day basis with a marked police car to see if they are giving value for money.

14.   Along with increased manpower, the state will use more unmarked cars.

15.   An unmarked car with a flashing red light stopped near a couple of policemen to consult.

16.   As midnight approached, two detectives approached in an unmarked car.

17.   As they tried to drive off, police in an unmarked car rammed their van and arrested the two men.

18.   Barone gave them false names, drove them to their tests in an unmarked car and paid for the tests himself.

19.   Behind this generally stationary line, plainclothes agents prowl in unmarked cars, while other, highly visible squads also watch the roads.

20.   A detective burst from an unmarked car, raced into the school and emerged with a student for an impromptu line-up on the sidewalk.