Mr Pounder Esquire wrote:
Well, in my early days the gas meter was under the stairs, no air
brick. In my later days, the gas meter was also under the stairs, no
air brick. In my a bit later days the gas meter was in the porch
thigee, no air brick. Ditto for a few more years in other houses.
In my present and probably my last home the gas meter is in a dead
posh cupboard in the hall, no air brick.

Pretty much the same as 90% of the population then