I don't think you're a pleb expat. I grew up on a council estate, though I don't live on one any more. I don't think that's relevant btw but as you brought it up, those are my pleb credentials.
What I'm concerned about is that many people, you included, think this is a new law.
It's not. It's an extension of criminal offences that will turn out to be expensive and to the detriment of people who need the police and criminal courts to do more pressing things than taking care of the interests of absentee landlords who are already covered under civil law.
All occupied residential properties, whether owner-occupied or rented, are covered by the criminal law even if you leave them to go on holiday, a hospital stay or are waiting to move into them. That's just about every residential property in the UK.
Squatting in those properties has been a criminal offence since 1977 in England and Wales and the police can and will remove squatters.
If they need reminding of their legal obligations then that is the job of the Government and the only job that needs doing.
That leaves properties that aren't under permanent residential occupation. I have a great deal of sympathy for landlords in the event that unauthorised people move in, but the police and courts have enough to do, and their redress is in the civil courts.
We don't send the police round when people park illegally, walk, pitch a tent and a million-and-one other transgressions on private land because it's not a good use of resources.
I've no idea why this was trumpeted as a great leap forward today.
With my charitable hat on I'd think it was the Government searching for something sure to look good on the front of the papers.
With my cynical hat on I suspect they're softening us up for something that will help their friends and donors and divert scarce resources to it.
Resources to prosecute the anti-social bastards who infest streets whether council-owned or not...