Brenton — As Christine says, Bagley. ... and a great rarity. It is supposed to fit in your
3013 bowl to make up the three piece 3013 8½" flower set, first advertised PG 1 April 1936. Its proper name is
The New Mushroom Flower Displayer according to Bagley's PG advertisement of 1 August 1936.
Numbers:
The 1 August 1936 advertisement gives Regd. No. 802118,Bowey & Parsons, 2004 gives Regd. Nos. 802118 and 802723 of April and May 1935,Jim Edgley's blue book doesn't list either,Your piece carries a Patent No. 436637, new to me.Bernard C.

Note that no British manufacturer has ever used the dreadful f word, which can leads you to some ridiculous expressions such as pelican f**g, squirrel f**g, and nude lady f**g, for example. I would be grateful if you would try to keep to flower block, displayer, support, holder &c., at least here on the GMB.