Knocked an exploratory hole in the wall under the stairs, confirmed it's clear under there and suitable for me to build a cupboard.
Why do builders do this? Most new homes have a boxed in void under the stairs rather than a cupboard. Probably just cost.

weathers ok here so will go for a moderate spin in a while. Young seagull is off the roof again but looks big enough to give a cat a nasty peck [or me] it can take its chances.