It is pretty much how policing works in the UK. Declare it a civil matter, get it off the books as soon as possible... and that's not mentioning the mountain of police misconduct court cases that have popped up recently.

Sadly the only chance of getting anything out of them is if the media get involved and hold their feet in the fire a bit.

Why do you expect the police to investigate this?

If A says that B is trespassing on their property, and A not B is listed as the legal owner of the property according to the single source of truth, isn't it normal that the police should evict B and defend A's property rights?

Imagine if the police took the attitude "we have to give equal weight to B's hard luck story about how he's the technical owner". Harassment and vexatious claims of fraud would be absolutely rampant.

This is what fiscal responsibility looks like. The police and local councils have been cut to the bone by the Tories.