Studio pottery, covered jar with tree or leaf pattern; mystery bp mark

Stoneware covered jar,  bold throwing rings and dark brown glaze,  with a tree or  possibly leaf  pattern repeated three times.  Main body 10cm high. Clear impressed mark.

I’ve come across the mark a few times but not managed to ID it

Can you remember if the other pieces had any particular style?

Edited:

Other ones here

https://www.20thcenturyforum.com/t32673-pot-with-impressed-leaves-bp-mark

https://www.20thcenturyforum.com/t11595-stoneware-vase-with-bp-mark