Vintage/antique Vegetable Dish

Hello I’ve just come across this bowl and wondering if this is a vegetable dish as it’s similar size to the other oval dish, from the pass, I don’t know how old it is but embossed British made, which I believe could make this very old maybe it’s antique or deco ?
I just noticed that it has a rd number, I wonder if anyone knows how to translate it, normally only see them on antique’s