Social Anxiety Syndrome - better known as Imposter Syndrome - is a real thing and can affect people from all walks of life, especially those in the public eye, from comedians, to actors, to broadcasters. Why can't we accept our successes? What makes us doubt our achievements? How can we get over it? TV presenter and PR guru, Nick Ede, examines this phenomenon, talking to some of the most successful and talented people working today.