The Human Button

Historian Prof Peter Hennessy speaks to the people who have operated Britain's nuclear deterrent over the years and today, including military commanders, politicians and former Vulcan bomber crew members. He visits Northwood, the headquarters from which the order to fire would come today, and Corsham, the secret nuclear bunker which, in the 1960s, would have been the location for an alternative government in the event of all-out war.