Thanks Cat, I've seen others of these around and they are alleged to date from 1980's-ish, but none of them are marked, labelled or back-stamped. A local dealer who has one in her stock suggested they might be Wetheriggs Pottery (in Cumbria - but now closed down), another pottery collector suggested it might be Grayshott Pottery, whilst a third suggested they might be early John Kershaw. So, we are all as puzzled as each other on these Cat!