When Regan, Carter and Ingram are sitting in Ingram's blue Cortina, its front numberplate is DLO 97M. A few seconds later when Ingram drives away from Tober's shop after stopping to ask directions, the rear numberplate is NHK 296M. In order to make the fleet of cars look larger, the producers sometimes put false plates on cars, but they evidently only changed the front plate in this case.
As the blue security van brakes to a halt outside the factory just before the robbery in the pre-titles scenes, the brake lights of the camera car in front of it can be seen reflected in the blue van.