Someone was busy creating objects out of metal, perhaps iron, at a local market.

I remember my days as a kid in the working class surroundings of East London where we would have the “old iron man” that would come and collects old iron pieces no longer used. He must have made some money out of it at the time

There was an old cockney song. I found this version by the Muppets.

FOWC with Fandango: Iron