unless theyve changed their remit cps will aim to secure the most sucessful prosecution. The reason being that they are measured on sucessful prosecutions, not what may happen in the future regarding an appeal, as there is no way of knowing that at the time of the case, as if there was it would be dealt with in court at the time! Hence why a case will often be dropped to a lesser charge if the defendent pleads to it. I can recall cases where the cps were happy to accept lesser charges for a guilty plea despit our best arguments with them at court. I wont give you all the examples as we will be here all day!