The UN describes people living with disabilities as the world’s largest minority group. A billion of us live with some sort of disability and are up to twice as likely to be unemployed than non-disabled people. For Caroline Casey, the founder and creator of the Valuable 500, this was a challenge. She calls herself a troublemaker and as such she has persuaded the CEO's of more than 500 of the world's biggest companies to personally sign a declaration to end disability exclusion in the workplace. Tamasin Ford meets Caroline and hears her story and what motivates her. We also hear from disabled Ugandan worker Naome Akwee, Sam Latif from London and executives from some of the Valuable 500 including Santen, a Japanese pharmaceutical company and Ernst and Young.