I name this house...?

Had a fair bit of banter on my Facebook page today about the Glaswegian name for this type of house.
It's all part of my research for the book I'm co-writing about the artist, George Wyllie.
I'm finding I get terribly distracted by little details but then, as I know from experience, the devil is in the detail!
I think I'm plumping for 'two in a block'. Happy to be corrected.