One of the things explained in the article linked to in the previous posting is that product placement often happens in a quite subtle way, without the brand being spelt out clearly, for everyone to see. Street art adverts can be part of a campaign, and the street art bit only makes sense if you also notice the rest of that campaign.
So, for instance, is this, also spied in Bermondsey by me the day before yesterday, also some kind of advert?:
So, maybe it’s just a painting, of a red chameleon.
LATER: And it would appear that these are just flamingos:
I also saw them on my Stoke Newingtonian travels.
Both the flamingos and the red chameleon are, it would seem, the work of Frankie Strand. That she signed the chameleon was a clue. And a little googling got me to her particular fondness also for flamingos.