Street Furniture

I came across these spheres by chance recently, on one of my photographic meanders in central London, near St Paul's Cathedral.

Don't know when they were put there, or for how long, or who constructed them. And the people walking by enjoyed taking photos of themselves in the very reflective convex surfaces and then inspecting the image on the backs their cameras. You can get an interesting reflection of the cathedral nearby also. The spheres are  interesting, if different, street furniture.