Any ID for this teapot?

I may have got a bit carried away and bought a huge collection of studio pottery at auction on spec because it looked “right.” I was right, there’s lots of lovely clearly marked pots by good makers but I’ve also given myself  a huge pile of unknown marks to track down. I’ll start with this huge but nicely potted teapot - any ideas? I can’t find anything for the mark





Any suggestions gratefully accepted.

Helen