Thank you for showing the design representation, Paul.
It will be interesting to see if other shapes from Heppell's RD 295919 come to light.
Just for reference, the 'George Peabody' plate was from Henry Greener's RD 236921, registered on 7 December 1869 – Parcel 7, and there was, indeed, a matching cup. (There is also a sugar basin in that design).
Fred.