ID required for studio vase signed Frank ....

A tall facetted stoneware vase with an incised signature. I won't win any prizes for making out the first name "Frank", but not at all sure how the surname reads. I am seeing "tryan".  Any help appreciated, thanks.

Maybe try rubbing some marmite over the base to highlight the signature

Thanks Naomi, I'll do that as a last resort if no one recognises the potter.
Besides, I don't want the vase smelling like bin juice

I do it all the time; It’ll wash off easily enough Some recommend using cinnamon but I find it too coarse

Thank you both, though it's back in the tub for now. I'll probably dig it out tomorrow and give one or both methods a try, cheers.

Tried both, the bin juice came out the winner for this piece. A little clearer, not a massive difference, but the surname (if it is that) reads as Bryan. No records of this potter, that I can find as yet.