sorry to dig this one up again .............. unexciting I know, but another jelly/blancmange related directly to the Wm. A. Bailey Registration No. 547034 posted by Fred, in reply No. 8, back on 21st May 2014. I doubt that this particular mould was pressed as far back as 1909, and unlike Fred's more shallow and oval shape, this one is taller and circular.
Fred's example carried the factory pattern No. 7317, and this one appears to be 7323 - probably just two out of a substantial series of pattern Nos., which may have covered the company's entire range of kitchenalia items - and since this one is a slightly later No. then perhaps a design made subsequent to 7317. Will and try to find the original drawing for this Reg. when next at Kew.