If a doctor or a nurse makes a mistake with your care, or the care of a loved one, you would expect to be told about it. But putting in place a process where there is a duty of candour within the health service is proving extremely difficult. Northern Ireland remains the only part of the UK or Ireland not to have one. The Hyponatraemia inquiry into the deaths of five children in hospital put the focus on the need for it. The inquiry chair Mr Justice O'Hara said some of the witnesses had to have the truth dragged out of them. The health minister says he hopes to introduce one in before the next Assembly election, but why is it so challenging? Audrey Carville is joined by Deirdre Heenan (professor of social policy at Ulster University) and Peter McBride (an independent consultant who has been working with the Department of Health on building a framework for a duty of candour).