Hello and welcome.

Googling the name brought this link from 2021 up.
https://www.watfordobserver.co.uk/news/19378918.watford-glass-company-sold-vases-buckingham-palace/I have copied and pasted this bit from the bottom of the article. If you were to contact them they might be able to help?
"Watford Museum has now reopened to the public. Admission is free but book first – call 01923 232297 or email info@watfordmuseum.org.uk. For more information, visit
www.watfordmuseum.org.uk"
Having said that, your vase is not what would be called a traditional cut, but a rather more scarce kind known as "Art Cut", which was tried by a few companies around the 1930s. It was not as popular as anticipated at the time, but it is appreciated much more now.
I'm sorry, but we do not give valuations. What something is worth is what somebody else is willing to pay for it, in that location, at that time. It can get very contentious arguing about money and we don't want to get bogged down with that, or have accusations leveled at us if something disappoints.
Once you have a identity, you can search the web yourself for previous sales to get a ball-park figure.
We're here to identify glass.