I'll start on the Embankment. I love these lamps, they are very ornate and usually have a dolphin at the base with leaves winding up the post to the lamp above.
Can you imagine a London (or any large city) street without lighting? How unsafe, creepy and dangerous it would be to walk around these streets after the sun had set.
This is an old gas lamp has been converted to electric. There are several hundred of these lamps that have survived from the Victorian age.
An old dental surgeon's lamp in Bloomsbury. It's still a dental practice.Here's a wiki page all about him.
More lamps along the Embankment with St Paul's cathedral in the background.
This fancy lamp is on a bridge near Gloucester Gate.
These men were doing some maintenance on a lamp in St. Dunstan's Court, just off Ludgate.
This very old gas lamp is on the wall of the Centre Page pub in Knightrider Street, Cheapside.
This life-size lamp is outside Triton Court in Finsbury Square.
Now it's time to extinguish this post, I hope you enjoyed looking at the photo's.