[2][3] Leighton specialises in celebrity portraiture, fashion, and pop videos.
"[5] His clients have included Kate Bush,[6] Dawn French,[7] John Hurt,[8] Bob Monkhouse,[7] Lisa Snowden[9] and Kareena Kapoor.
[10] He has also photographed for The Fairtrade Foundation, including portraits of Vic Reeves,[11] Amanda Burton, Fearne Cotton,[12] Richard Wilson,[12] and Harry Hill.
[14] The Jokers is a coffee-table book featuring portraits of television, radio, and stage comedians.
[15] Photographs from this book were also featured in a National Portrait Gallery touring exhibition entitled "Comedians: From the 1940s to Now".