I quite possibly could be wrong, but surely the police should only be there to prevent a breach of the peace, and be impartial ( although i know from experience that they are not ). She would have to get a search warrant, and would have to have a good reason to get one, i would have thought. If i was to guess, she might try to bully and harass you a bit first, but remember you do not have to answer your door to anyone, in fact the police tell everyone not to answer the door to cold callers. The best bet would be to ring someone like Clive Rees for some advice, fore warned is fore armed, so to