ok I've looked at British Glass Between the Wars and I see what you mean. It's not the same design though but similar idea. However:
- having looked under a magnifying glass it's hard to tell but I think the circles on the Stuart BGBtW are engraved on
- the no pontil and cut rim would still make me think Czech rather than British as a first port of call to look. But I could be very wrong

Have you checked Hajdamach British Glass?
The photographs in BGBtW are terrible to see clearly, but there is a decanter page 93 by Laura Knight for Stuart that also reminds me of your vase whimsical, sparse, lines and circles (can't see how that circle was done but perhaps Hajdamach will have a better picture - will go look)
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