I come from what is referred to as "The North" in the UK, spent a few years homeless as a kid, but we bounced back in the end.
But one thing I remember above all else was...
It's this... how do I describe it... cheap? Chemically? I mean yes but the closest I can think of is "childhood" it's a sort of super cheap "desert" ready mix that creates this... foam... that you then cool to create close to a mousse but with alot more air that just tastes of artificial whatever on the packet, I think butterscotch was wildly regarded as the closest to tasting "nice" out of the selection so that's what everyone had.
But I have friends from more affluent parts of the country who have never heard of this, its quite funny really. They always ask "does it taste nice?" To which I always respond "no, no it really doesn't" but for some reason I never turn my nose up at it when it's on offer and it feels comforting.