Robert Giles Rumney Pottery

Wondering if anybody knows anything much about this pottery. I have this 9 inch diameter dish with sgrafitto dragon decoration, the reverse is signed ROBERT GILES RUMNEY WALES. All the images I have been able to find show pieces marked as RUMNEY POTTERY. I know that Robert Giles family have been potting here for about seven generations and he must be in his seventies now and I am just trying to get an idea of date of this piece.
I have tried emailing the address on their website but it just keeps bouncing back so not sure if still in operation.
All thoughts appreciated

Hi Vannmann, my guess the dish is 1970s kind of era. I just picked up this jug today - and managed to work out it says Rumney Cardiff. Base reminds me of Ewenny pieces - same knind of area, both earthenware.
I would think this jug is an earlier piece, maybe early 20th C or 1920s, 30s.