Hi Dave,
For me, (despite the build date) the "Coronet flats" doesn't qualify on stylistic grounds (too angular and naked bricks are visible), not that I am knowledgeable on Art Deco.
"Waterloo Hotel" does and I wouldn't toss out the blue one either, for the reason you give.
That said, a google image review of "art deco buildings" does show
some brick ones I wouldn't rule out, so I guess it is subjective
OK, now to the pictures:
Somehow you managed a good elevation and at a sun angle to capture the "Coronet flats" very well (even the cloud position works well). I prefer the colour version.
Good timing to avoid any traffic at what I assume is a busy intersection/junction in front of the "Waterloo Hotel".
The technical aspects of all three shots are good and nothing strikes me as needing improvement.
Have you considered some cloning to remove a few modern items that most spoil these?
I'm thinking about; the two cars in the "Coronet flats" shot, the traffic lights in the "Waterloo Hotel" shot and the parking restriction(?) pole in the last?
Ya know what; the more I look at it, perhaps "Coronet flats"
does qualify
Cheers, Dave