@Wendy117
You seem to be on top of your situation, and I'm glad to learn Airbnb were helpful in your latest booking.
In the UK the police don't get involved in issues of rental & lodgings that are deemed 'civil' matters to be pursued through the civili courts. -- Police will only get involved in an obviously criminal circumstance.
Otherwise, worth mentioning, that as a live-in host, I've encountered very few problems in six years of hosting. Moreover, judging by all the Airbnb forums I've participated in over the years, I've evidently encountered far fewer problems than absentee hosts.--I believe this is in a large part due to my never activating Instant Book. and so always retaining as much control as possible on the decision as to whom to host or not.
However, of the problems encountered, they were mostly related to 3rd Party bookings, especially the undisclosed ones prior to booking. As a result I've managed to have 3 Reviews deleted in the past 18 months. -- It's naturally made me more carefull still, and I will only consider 3rd Party requests if the booker is able to attend at arrival of their charge. This is basically Londoners wanting to lodge a relative or friend. Otherwise, I encourage the Inquirer to get one of their intended guests to open their own account and make an independent booking.