The hidden 1 billion. Despite being 15% of the world’s population; where one in every four households in the world has a person with a significant enough disability for it to make a difference to their everyday life, people with disabilities often remain marginalised, invisible, and the last in line when it comes to international development or global health or human rights efforts. But things are changing - with some help from Professor Nora Groce and colleagues at the Disability Research Centre at UCL. In this episode we hear about efforts to include disability in the Sustainable Development Goals, and about Nora’s part in the development of the UN Convention on the Rights of Persons with Disabilities (CRPD). The question is; ‘what is the everyday experience for people living with a disability in their local environment? And what could be achieved if instead of expecting people with a disability to adapt to the world as it is, we considered how we can adapt the things we do, to be inclusive for people with disabilities?’