Mustard tango glass vase with London hallmark 1926

This mustard yellow cased glass vase is hallmarked HPS (for Henry Perkins & Sons), London, 1926. Although the maker is unknown to me, what I like about H/M silver on glass is that (accepting that it hasn't been added later) it gives a datestamp and location. In this case, the location, London, isn't likely to be the place of origin of this glass as companies like HPS imported glass, including glass from Bohemia.

These shapes and colours, especially the yellow, and the fineness of the cased glass, all point to Czech/Bohemia. I wonder who and where?

It is just over 19.5cm high. It is shown with its sisters in pic. 4.

I am going to put it in (late) Art Nouveau owing to the Nouveau shape - but let me know if I have got that very wrong.