Richard Angell from the 'Terrence Higgins Trust' joins us to discuss the new Russel T Davies Channel 4 drama 'It's A Sin' which portrays the AIDS crisis in the gay community in the 1980's. Richard chats to Sam about the response to the show and the progress that has been made in terms of treating those with HIV and the goal to have zero HIV transmissions in the U.K. by 2030.