Concentrating mostly on the very young children's stories, he contributed to such well-known titles and Tiny Tots and Jack and Jill, as well as illustrating many Disneytie-in comics and inserts.
In 1975, Wyatt began work on the controversial boy's comic Action! as Assistant Art Editor. When that title was withdrawn following the infamous "banned" issue, he became the Art Editor on IPC's new launch, science fiction comic 2000AD. Overseeing the comic's second and third years in print, he played a large role in nurturing the developing talents of Brian Bolland and Mike McMahon, among others.