The message . uk
from Ed Sirett contains these words:

Behind the washing machine will not cause a draught and may let the
installer off some making good.

The original vents for the boilers on this estate were on the front
kitchen wall behind the washing machine and on the flank kitchen wall
top and bottom. Plenty. Except in many cases the front door has been
moved to beyond the vents on the flank and you can often see tape over
the vents in the front wall.
Arguably this doesn't matter for many of the boilers as looking up you
can see from the terminal on the roof that they've been changed to a
balanced flue.

However, I'm sure most of them are still using gas hobs with no
appreciable ventilation in the kitchen at all.

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