It didn't look Sowerby to me and I immediately thought Czech, but you are right
:hiclp: Thanks for the prompt. I've found a near match in Glen & Stephen's 'Sowerby's Ellison Glass Works Vol.Two George V to Elizabeth II' i.e. Illustrated list c.1940s page 4.
A 'cupped' 8" high version (no.2750) is shown and there is mention of a 'straight' version but this isn't shown. The cupped one shown came in amber, flint, blue and green, but no mention of uranium glass. The cupped version also appears in Illustrated List no. 38 1956 p.5. I'm just wondering if mine is the straight version, even though it flares outwards at the top (which would also probably account for it being over 9" tall too)? Hopefully Glen will look in sometime.