Back in the early 80s I did what many people arriving in London did: I squatted in a house that had been left empty. Anyone doing the same after Saturday will be a criminal.
The house in question was owned by the Greater London Council (GLC) and like many others owned by local authorities all over London it had been left empty for years because of a road scheme that never was or a slum clearance scheme that was never finished. Nobody was living there and, given the big hole in the floor of one of the bedrooms and the water streaming down the walls of most of the others, that was understandable. So when we squatted it we were not denying anybody else a home, we were simply fixing it up and creating one for ourselves in what became one more squat in a whole street of squats. Given that we were all on the dole (this was 1981, the worst time to be a graduate until now) we were probably even saving the taxpayer money.