[Andre607]

What's striking is that nearly every one (with only a couple possible exceptions) of these photos show children and family occupants. Did single people (without kids) not live in these tenement blocks, or were in the overwhelmingly minority and these were mostly flats for housing family units? Or were singles just as common, but are not represented in the photographs?

[prestonbriggs]

At the bottom of the page are links to other pages of Hedges' work. There are a number (e.g., in London) showing single men living alone. Often pensioners (OAPs).

Perhaps your guess that the particular tenements in Glasgow were reserved for families is right.