A very rare piece of glass as Tracy Weston only worked for a couple of years, to the best of my recollection, as an assistant to Neil Wilkin at his first studio near Bath (before he went to Dartington).
I remember him commenting that she was very talented, but as with many talented glassmakers, she did not continue with a career in glass, as this brings financial pressures. It is very possible that she became a photographer so it may be worth contacting her.
She was a very pleasant person with a friendly outgoing personality. I only met her once or twice.