this link to a Bonhams page shows that even the experts can get things wrong...or can they?
This jug and bowl is a big curiosity - attributed by Bonhams to Spencer Edge for the Malkin factory. But readers of my blog and serious Bisto collectors will know that this image was in fact, designed by Louis Rhead (originally for the Sun magazine). So what is the truth here? i suspect Spencer Edge used the existing image on his wares, just as Bishop & Stonier did, but did his own colour variations and thus legitimately (?) claiming ownership of the design.
The fact remains, however, that Louis Rhead was the originator of the image and whether he had any direct control over the image when used by different pottery factories is still to be found out.