Studio pottery flagon & goblets with impressed sunrise mark? Daisy flower?

Hello there experts.
Have come across a delicious coloured group of studio pots which must date from the 1970s. Stoppered flagon and four goblets. Been hunting online and not been able to locate a reference to the very distinctive impressed mark.
Sunrise? Flower?
Any ideas or pointers would be appreciated. Located in the North UK if that helps?
Hoping to hear. And thank you

Hoping the pics will post this time around.
M