I have been able to find the catalogue reference that I mentioned above. Chris's glasses in this thread and Anne's bowl both appear to be from Stuart & Sons, marketed as "Plain Ringed Goods" and both from the service 21696.
I say 'appear', since it says at the top of the page "in FLINT, GREEN or GOLD". This is from Catalogue 51, which is annotated, in my copy, as being from 1939. It doesn't mean that other colours weren't introduced of course.