Henry had been a Grand Prix reporter since the early 1970s, and he was the Formula One correspondent of The Guardian. Until the end of 2012, he was Grand Prix editor of Autocar magazine; he was the Editor at Large of F1 Racing magazine. Henry was also the chief editor of the yearly AutocourseFormula One season review books, a position he had held since 1988, and he wrote a weekly blog for the McLaren team's website. Additionally, Henry authored more than 50 motorsport-related books and won the 1984 Pierre Dreyfus award from the Guild of Motoring Writers for his book Ferrari: The Grand Prix Cars.