Hello,
I would be very surprised if this vase is British and from the 30's or 50's. It has a flat base, not typical of British production in those periods, but possible since the late 1990's.
Thomas Webb would be marked from that period, as would the succesor to Webb Corbett - Royal Doulton. Stuarts would also be marked, and Royal Brierley in my experience.
The ware on the base is quite possible for something as late as I'm suggesting, since the metal is a lead crystal and susceptible to marking. Whilst dirt and muck is a good idicator of some age, it can build up surprisingly quickly given the righty conditions.
Finally, a question that maybe I should have asked before commenting, how crisp is the cutting? If you like, how sharp is the edge to the cut? The images suggest that it has been acid polished to me.
Nigel
Edit: And certainly not Keith Murray, even though he used this cut, wrong shape, wrong finish, no polished pontil.