very nice Keith
It looks to be something which Jobling called a Lambton vase, and as was usual with many of their pieces it came in a variety of colours including Opalique, although Baker & Crowe don't mention opaque white - I assume yours isn't opalescent. According to the catalogue the size was 11.5" x 6", and there was a black plinth base made, it appears, especially for the vase - factory No. 2535L, and available in pink, blue, green and amber plus satin finish plus the obligatory black. The vase on it's own had the Jobling Catalogue reference No. B1 - and for which it is known that the original plaster model was made by Franckhauser.
In addition, if you had £1 - 3 - 6d. to spare, you could buy the factory conversion to 'Electric Table Lamp' - which I suspect is now worth a great deal more.
Unusually, to my mind, the catalogue also comments that this vase was available in flint, bit odd since most Jobling glass is coloured or opalique.
What the origin of the name Lambton was I've no idea, but according to the catalogue it was given, confusingly, to two different decorative designs - one called a bird pattern and the other a rose pattern (Board of Trade Rd. Nos. 787871 and 787872, both Registered on 15th November 1933).
Baker & Crowe list this particular shape/design as one of the few items (at least it was in 1985 when the catalogue was produced), as being without a listed Rd. No. - although it's possible that this may be accounted for by what may have been the already Registered 'Rose Pattern' in bowl form - see above.
I've quoted from the Baker & Crowe catalogue only, since I know less than nothing about Jobling, but we do have folk here who know vastly more, so fingers crossed they will be able to put some flesh on the bones.
Wouldn't be surprised to learn that this is a scarce item - well done - very nice, and I'm green.