I was in Brussels last week, and I think London will end up the same. The core central area (I accept Brussels is tiny compared to London), was gorgeous with the usual pavement cafes, the Grand Place and the gallery shops and so on. That is well policed and manicured/sanitised. Outside of this area is just ok, but the further you get from the core the worse it is.
So maybe that's what will happen. Whatever part of London you might think is "core" will be sanitised and touristic, the rest left to rot. A bit like Paris I suppose.
Not a nice thought. It's really awful that those who live, work and visit London have to endure this day and night, the quality of life for those who pay for it is not as good as it should be. The big problem and it always was, is the fact that few of the campers are here legally. Even pre Brexit, those arriving from EU had to prove they could support themselves within three months or be sent back. Ha Ha Ha, I doubt that ever happened, so now most of them definitely don't have free movement and still nothing is done.
My apologies if I come across as an intolerant so and so. But it's there before our eyes isn't it?