Hand Painted Plates Marjorie Stevenson Wetherby

These look like standard plate blanks, I assume, and then they've been hand painted with flowers and fruit by Marjorie Stevenson - label on back.
I'm no artist, but to me they look pretty competently painted.
I've drawn a complete blank researching this person, and I even have an address label - does anybody have any clues - any info gratefully received, as always.

I think the plate is a schumann arzberg reticulated plate.

That seems to fit from what I've now seen. Did they sell blank plates in the 60s or 70s (judging by the label telephone style)?

I'm not sure. Most of their plates are marked on the back. Here is a batch of her plates that sold at auction. The back of the plate
that is shown appears to have had the mark covered over.
https://www.the-saleroom.com/en-gb/auction-catalogues/thimbleby-and-shorland/catalogue-id-ibts10310/lot-6384d901-dd73-4ada-b187-b03d00e4e4e0