thanks for the reply!
no i didn't expressly remove permission at the time and the case is not ongoing - I was just interested to see if I had removed permission what the effect would have been or does Section 17 of the Police and Criminal Evidence Act give the police power that overrides that?
What would usually happen in real life is that both sides of the argument would be put forward and the Court would reject one.
I know know that seems an obvious reply but in real terms there are very few defences which would cause the Crown to simply withdraw and not put together a defence. So to answer your question, if I were representing someone who had removed consent and no accident was involved I would consider running it, with other defences.