Phil,
Terrific photos, thank you very much, especially the Daimler (HOV), and I've stood at that stop on the left a few times. and I almost certainly bought a ''penny child's'' on that particular bus, in both directions, though mainly started off going up to the Bristol Rd on the way to school every day.
To get a ''workmans return'' wasn't it necessary to pay (not just get on) before/by 7 am... being too young I never had one - but I wonder if anyone remembers how the old ''workmans return'' was operated.