Stoneware studio bowl, DC Derek Clarkson?

Stoneware bowl, toasted outside, green inside, DC mark
I presumed Derek Clarkson when I bought it but can’t see similar online and mark is in circle rather than square.
Known maker? ( nicely made bowl )

Delan Cookson had a somewhat similar looking mark early in his career. Only the DC was vertical. Early undocumented mark? Given that it is a fairly standard looking Leach type bowl, this is probably the type of ware that people produced early in their career. Equally, this type of bowl was Very popular in the 60's 70's.

There have been a few bowls in this style turning up recently. Most of them unmarked. I suspect it's a Leach-trained potter from the 90s-early 2000s.

Thanks Phil and Naomi. It’s a nice bowl but a bit chippy - I just wanted to know.