I have no idea...

What this may all be about, but I thought it was the most striking piece of street art on display in Leake Street Arches. The extra made me chuckle, but it was in a very awkward spot for photography, with blinding sunlight streaming in from behind it. I think they both work best in large.

If you want to see more, there is of course the now obligatory album on Flickr

https://www.flickr.com/photos/198968208@N02/albums/72177720326494960