Client was charged by the police with careless driving. It was alleged that he had driven at high speed into a bend and had lost control of his vehicle, colliding with an oncoming car. Witnesses in the oncoming car purported to have seen the defendant travelling towards them at high speed. Having visited the scene and prepared detailed measurements and an expert report, it was shown that the witnesses could not possibly have seen the events they described. On the basis of our expert report, CPS withdrew the case the evening before the trial was due to commence.