Hi Leni, I have had a few moments to contact Keith Hill about this figurine, and he has suggested that it could well be by Rowan van der Holt who has a workshop in Bristol.
When I visited Keith and Judy to pick up a piece of Komaromy glass, he showed me a small collection of this type of glass he had, and so I took the liberty of asking him about your piece. And Rowan was, in his opinion, quite possibly the maker.
Rowan will be exhibiting at the Cambridge Glass fair, so if you are going, it might be worth taking some pictures of your lovely dancer with you, and asking her. If you aren't going, I am happy to ask for you if you want to send a few pics to me to take along.
Just let me know.....I will be visiting her stand anyway, so it will be no trouble.
Rosie.