1970s ceramicist "MB"

[annem]

I bought a "squashed pot" at Dartington Hall in the mid 1970s. It has the intials MB Imprinted (is that the correct term).

It has a matt finish (sorry I don't know the correct terms) in tones of brown on beige in partly swirley pattern a bit like a rock formation.

I believe it was a relatively new idea to make pots which are purely decorative with no function so I'm hoping I can track down who made it.

Does anyone have any ideas where I could find the info or maybe even know who might have made it?

Thanks