Peter Cooper drew single-panel topical cartoons in the Observer in 1964, and has also drawn general joke cartoons for such publications as DailyMail, Observer, Peace News, Spectator, Tribune, Building, Times Educational Supplement, Teacher, New Scientist, Eastern DailyPress, New Statesman, Liberal Democrat News, Bella, Now, Guardian, Oldie, Sun, Punch and Private Eye amongst others.
He usually signs his name just 'cooper' in lower-case letters.