Hamish de Bretton-Gordon is a British chemical weapons expert whose work in Syria has attracted global attention. But working in a warzone is dangerous and not only has Hamish had to smuggle himself into countries, he's faced bombs, bullets and even the Islamic State group in order to investigate and document chemical warfare. Hamish has written a book called Chemical Warrior: Saving Lives on the Front Line of Modern Warfare.

Presenter: Emily Webb

Producer: Thomas Harding Assinder

Picture: Hamish de Bretton-Gordon

Credit: Hamish de Bretton-Gordon