Polperro Pottery - Frank & Angie Robinson?

Hi, I've recently bought several pieces of great pottery which I think are from Polperro pottery. There seems to be very little about this pottery on the web and a comment on Ceramike saying 'Do not look in BSPM as not listed properly'. The BSPM book certainly doesn't show the impressed P in a square which is on my pieces. If fellow members of this site can confirm that this is a Polperro mark then I'll upload this image to the labels, signatures and backstamps section as a reference. I'm pretty convinced from the picture on ceramike and the comment by Christian Robinson on it, but being a cautious soul I'd like to get confirmation for the example below.
This is my first post on this site so apologies if I'm not doing it right!
Thanks,
Marie.

Ceramike link

Thanks for the welcome message Skay . Hi Dantheman. The digital museum of Cornish Ceramics has quite a few empty spaces in their image column from what I recall. They are welcome to use my image if it's helpful. I wondered if anyone on this forum knew the Polperro mark?
Marie.