Been away, so catching up again
This is not Keith Murray - despite some hints
at ceramic shapes made by Wedgwood to his designs.
be Stevens & Williams, depending on its weight/thickness, etc. Might also be Sandvik (for Orresfors) if it has lighter weight. I am sure that there are other contenders as well.
I would really need to handle this one to access the colour, weight and construction to get a better idea.