The message
from Derek ^ contains these words:

Seemingly having a "Ventilated food cupboard" was part of the criteria
used to decide whether a house was fit for habitation during the slum
clearances.

My house built 1976 had one.

This estate of around a thousand houses was built in the late 60s early
70s and none have one.

--
Skipweasel
Pay no attention to that man behind the curtain.