Robin goes back to his own days as a young reporter when he covered the last blasphemy trial ever held in the UK. At the time it appeared archaic and the end of an era, but blasphemy still exists in many countries across the world. In many ways it is the oldest of all challenges to free speech, so can religions ever truly countenance a world in which free speech is held to be sacred?

(Photo: Asia Bibi, a Christian woman sentenced to death in Pakistan for blasphemy in 2010 and acquitted by the Supreme Court in 2018. Credit: Martin Bureau/AFP/Getty Images)