For the fourth consecutive year, Mark is Chairman of the Judging Panel for the Wildlife Photographer of the Year competition – the world's biggest and most prestigious competition of its kind.

With an extensive collection of photographs taken in more than 100 countries around the world, Mark is an accomplished and well-published photographer. He has been photographing wildlife and wild places for more than 20 years and, though he is best known for his whale and dolphin images, his work covers everything from great white sharks and gaboon vipers, to magnificent frigatebirds and Komodo dragons. He spends more than half the year travelling the world in search of wildlife and exploring wild places and is continually adding to his image collection.

In 2007, he completed a world tour to photograph endangered-mammal projects in no fewer than 13 different countries for the David Shepherd Wildlife Foundation.

Mark also wrote the monthly four-page Photo Masterclass in BBC Wildlife magazine, which ran throughout 2006 to October 2007. Each masterclass - packed with advice on a different specialised field of wildlife photography - included an interview with a world-renowned photographer.