thanks Chris. Appreciate your comments about lack of clear casing and what appears to be a heat treated pontil, but shape still makes me think of a Nazeing pattern.
Looking at the link to m's powder pot, sorry, but I'm only seeing pale turquoise so unable to compare with the range of greens in Timberlake - but have to admit I wouldn't know what 'clear baby green' looked like anyway

. I'm unable to see a powder pot of that shape in Timblerlake - there are a couple, but the profiles appear quite different - plus, as far as I can see Nazeing did not offer that sort of lid with what Christine describes as a 'Lucite knob'. I've not come across this before - can someone explain please - I assume it's a chromey coated plastic sort of thing.
I'm not inclined to think that m's powder bowl is from Nazeing.
Further down on m's link there is a pale yellowy/green two handled posy shown by Sue. Nazeing offered similar looking posies (with pulled up sides) - both with and without handles, the latter apparently now very rare because it was thought to be a design failure. Two examples are shown in the book, and both appear to have clear casing which looks thickish at the base. Did you get a positive attribution to Nazeing Sue, for yours?? Of course, I guess other factories might well have offered a similar shaped posy vase.
and lastly - short tale of misfortune......... During the '60's and '70's Boots carried a range of Swedish inspired glassware which was supplied initially by Sowerby Ellison (Gateshead), although this ceased when they went out of business in 1972. Apparently, Nazeing took the opportunity to buy some of the pressed glass moulds. Simon Cottle has written of how the large number of cast iron moulds proved too heavy for the lorry bringing them down south, with the consequence that the bottom fell out of the lorry and scattered the moulds on the road!