[MargaretR]

In my 1940s childhood there wasn't a lamp there, although the phrase 'above t'lamp' was in use.
I was glad to see that the news article makes this clear
"The original lamp, a gas lamp, was removed many years ago and a campaign for its return saw two lamps, based on the original style, installed in the early 1970s, although only one of those now remains. "
It may well have been melted down for war munitions, just as house garden railings were.