Ok I have a couple of more questions. She is asserting that she has been paying me rent and is threatening to produce bank statements to my landlord as evidence (a housing co-operative, not the council). This would result in me facing a disciplinary hearing with a subcommittee and potentially losing my tenancy if they find that I have been subletting, which is strictly prohibited in my tenancy. She has been paying her way (not fully, I subsidise the rent, and she pays no council tax, is not electoral roll etc) although the informal arrangement we had was that I have total access to my place when I'm around, of course (I travel a lot for work) In the past year, maybe 18 months the relationship has deteriorated to the extent that she has been denying me to stay there, and Ive been avoiding a confrontation, as I've been trying to resolve this is in an amicable way.
I am totally prepared to change the locks at the end of the notice period and remove her property, and to face any hearings the co-operative should deem necessary if she does take action. My main concern is that I am not acting ILLEGALLY by doing this if she calls the police. My experiences in the past have led me to understand that the police would view this as a civil matter and not take action, especially if I can produce the tenancy and have full possession ie the keys. Please clarify this point.