I'm in an outer London suburb - and a fairly wealthy one at that ("leafy Tory suburbia" pretty much nails this place). Back at the start of December, a huge number of Deliveroo drivers started congregating on the market street every evening, and then drifting off to a nearby park as the night goes on. It's not quite become a permanent encampment yet, but it's well on its way. From what I've observed, very few of these guys have more than a few words of English. It doesn't really feel like a healthy situation for anybody.
There's only one local takeaway that I use and it's an old-fashioned one that still employs its own driver. For all I know, he's horribly downtrodden and oppressed, but at least he's not part of that slightly creepy pale-green army.