A few street lighting survivors in London

I was very surprised to find these 3 installations in relatively close proximity to each other in central London (near London Bridge station), given how LEDized most of London seems to be nowadays! From left to right: GEC Z8832 with swanneck bracket (presumably HPS), GEC Z5580 on an unusual column (possibly still mercury?), 35w SOX Eleco GR525 (sadly bowl-less but still working!)