Hi Sue,
Yes it does glow. Very strongly too, particularly on the handle and foot where the glass is thicker.
Hi John,
What a beautiful vase! I like it a lot! I did happen upon that Roman Glass page while searching around for makers of repro antiquity type glass - and the similar vessel to mine right at the bottom of the page - after toying with and attempting to rule out the possibility that it may indeed be modern. Fritz Heckert is an interesting avenue to search, which I will do so now. Many thanks

Hi Mike,
Again, many thanks. I shall go and search these suggestions now.