I've never seen this before in London, or perhaps just haven't noticed it before. People stood along the streets, with boards advertising their shop, restaurant, McDonalds, tattoo parlour, whatever. Here in this picture there were four together. I thought it was quite odd. There was one bloke, (the one with the Tattoo and Piercing board,) who was reading a paper at the same time.
I just thought it was peculiar. No one seemed to take any notice of them either.