IIRC Cheryl Gilham posed in Knave or Fiesta in the early 70's. I've been searching for the pics without success. She also appeared in a few softcore vids including : -
Girls Come First (1975) .... Zoe
Confessions of a Sex Maniac (1974) .... Mrs. Burrows
... aka The Man Who Couldn't Get Enough (UK: reissue title
It could be this issue of knave, as there is a girl named Cheryl on the model list on cover.(1976 vol 8/1)