Thanks! I think I spotted another example outside a private block of flats in Walthamstow, although this one looks to be running a different lamp.

Link: https://maps.app.goo.gl/vmiF9eA6THZBZcqx5?g_st=ic

Some post-top fluorescent lanterns survived longer than others by having their light sources converted. I saw a couple of post-top fluorescent lanterns about 15 years ago which when checked at night were running mercury lamps.

Eleco GR100 in Greenford north west London, spotted from a railtour yesterday. The junction is being remodelled and turned into a roundabout, so this column is now stranded on a what is now a new verge and no longer next to the new road layout. It won't be there for much longer.

Apparently, Sutton have been removing their concrete columns on their side roads. Are there any side roads which still have concrete columns, or side roads that are still predominantly SOX?

If you carry on along the road behind it, you'll see two more GR100s, along with an MA.