Hi Nigel,
Yes I now do understand what you mean about Nazeing, it does make it hard though when they produced such wide ranges of quality.
The large mushroom dish I had, which the Nazeing museum bought, was the more typical colour and bubble style, and not such fine glass, that I personally associate Nazeing producing.
I am hoping that in the near future when the children can be "trusted" to be left together and I can come back to a house not a war zone, to do a lot more traveling to fairs and exhibitions to learn in the flesh, so to speak, rather than from books where it is impossible to hold and feel the item.
Barbara