Not Nazeing I'm afraid.
I bet this has a wonderful concave pontil that is nicely polished? - Not a Nazeing characteristic. Nor is the way the the colour is laid in with the spattered technique as opposed to the more usual finer crushed enamel with 'pea-cock eyes', or, small bubbles with the colour collected around them. The colour in this case is too bright to be May Green and too light to be Sherwood Green, making it somewhere in the middle. I seem to remember that the shape of the base, or bowl, section is wrong for Nazeing as well - but don't quote me on that one!
As with the amber/brown and aventurine vase in another recent thread this posy bowl belongs with the same group of pieces often mistaken as Monart in the past and often, without any positive proof (certainly in this case), thought to be Czech.
When we attended the Nazeing Museum opening last month Andy McConnell asked myself, Geoff Timberlake and Christina Glover (of Circa Glass) to go through the shelves and re-identitfy items (at the end of the day). In the short time available we re-attributed various things on the general British glass shelves. We also took out all the S&W pieces that had been attributed to Nazeing, as well as several of these posy bowls. Other colours for these posy bowls include a sort of pale blue that seems to have a 'dirty' hue to it and an orange version. (BTW, we are all returning to the Museum on the 18th, to attempt a thorough overhaul of the Nazeing in order to help give it a better narrative and to try to establish what is, isn't, and might be, Nazeing. It should be an interesting, and hopefully productive day.)
Hope this helps, Nigel