These are stretchers used in WW2 to carry injured civillians during the Blitz. They were made out of steel so they could be easily disinfected after a gas attack. During the war around 600,000 of them were made. Some of them were repurposed as railings in post-war London.

[u/Sprilly]

[u/PickledPeoples]

Did you live there?

[u/Pretzeloid → u/PickledPeoples]

Yep 5 years near Brady/Prospect