Just dropped in after a long gap !!
These are clearely identified in the Whitefriars exhibition catalogue edited by Jackson and published by Dennis page 126, plate 117, item iv.
It is also in the Museum of London book in the reproducton of the cataogue pages.
Just to be my normal contentious self, I have always known this vase as ID'd through its registration number.........by, and through, other Whitefriars collectors and dealers many years ago - before all the books noted above
It has been discussed online before, not sure if on these boards, or on W/F's dot com. I remember commenting on the thread and saying that it was designed by a gentlemen from Hammersmith. Therefore, since he designed it (probably), and certainly owned the registration, he was able to sell to a number of companies - Powell and S&W being two of the known ones.
Sorry, the name has long since escaped my little grey cells
However, it was Miles Hoole who did the work in the Kew Archives