The carts used to be seen in all the busy parts of London—now not so much if at all in the West end. I used to look out for them to go ‘JW baiting’ but my sport is gone-- perhaps that’s why they have gone!! -- but more likely for breaches of planning and public safety.
Half Banana, that was exactly my observation during my short two day trip to London recently. Being a "normal" tourist, I was mentally prepared for and looking forward to some real nice chats with JW' s but nada, not a single one, no D2D, no cart witnessing... absolutely nothing.
And to think it was ME that was looking for them in a world capital city. I was like... WTF is going on here man...are they afraid and hiding now or something???