Yeah, I noticed that when I was in London a few months ago. They're almost non-existent in NYC as far as I can tell, and that experience has been consistent wit

Yeah, I noticed that when I was in London a few months ago. They're almost non-existent in NYC as far as I can tell, and that experience has been consistent with my experience elsewhere in the US. Perhaps the London merchants are required or otherwise incentivized to use portable ones?