Mike Tregenza
Little is known about Mike Tregenza. He was an illustrator of educational books for children in the 1970s, contributing a number of titles to the 'Picture Panorama of the World' series published by Owlet Books (1977) as well as books on space travel and the planets. The earliest book I have spotted was written and illustrated by Tregenza in 1974, entitled Espionage.

He also produced book jackets and an excellent set of illustrations for a series on the history of the submarine for Look and Learn in the Spring of 1981.