Thanks for bumping this Allan.
Given that the mark may well have the scrolled tail coming from the "t" it is more likely that this is pre-war than post. Although I do realise that the mark could well overlap with the one that replaced it there was a longer period of use of it pre-war.
If pre-war, then stylistically the long vertical leaves suggest the designs of Ludwig Kny with their strong similarity to his cut outlined deep mitre leaf/eye forms.
That said there is a bowl by John Luxton that immediately sprang to mind which uses a linked vertical leaf pattern that has concentric cut leaves within (pat no 29850) - see page 18, fig 84 of From Art Deco to Post Modernism, A Legacy of British Art Deco Glass (if you have a copy available!).
My hunch suggest its more likely Kny than Luxton as it's closer to his work. This is not a definitive answer, just trying to work it out from what I see.