[3][4] He also won the silver medal in the men's event at the 1967 International Cross Country Championships.
[1] In 1968, he was a two-time national champion, including setting a British record in the six mile event.
[6] At the 1968 Summer Olympics in Mexico City, Johnston competed in the men's marathon,[9] where he finished in eighth place.
[10] Johnston also tried to compete at the 1972 Summer Olympics in Munich, but suffered from an Achilles tendon injury.
[1] In 2016, Johnston wrote a biography on Otto Peltzer, a German middle distance runner,[11] which was illustrated by fellow Olympian Donald Macgregor.