Studio Pottery Chop Mark

Found these 2 studio pottery vases and i am trying to identify the maker. I have been looking all over for the chop mark. i have either missed it or just not found it yet. Any help would be appreciated. The one on the left measures 6 1/2" tall and 4 3/4" wide, the one on the right is 6" tall and 6 1/4" wide.

 

Is Tom Homann one of the names you've checked? Not an exact mark match but similar shown here.

https://www.themarksproject.org/marks/homann

 

Kirsty Adams, Newcastle-Upon-Tyne? Not like her current work, but she did study in Japan, and the K in her chop mark is very similar.

 

I do not think it is Tom Homann. The chop mark looks like a match to Kirsty Adams. I will start looking at more of her work. Would this be considered a raku glaze?

 

No, not raku. It's high-fired stoneware or porcelain, possibly wood-fired. Could be a soda or salt glaze.

 

Thank you.