In 1998, Chief Historian of the Foreign Office Gill Bennett was commissioned by Foreign Secretary Robin Cook to get to the bottom of a mystery that had haunted the Labour Party - and British politics more generally - for over seventy years. This is the story of what she discovered.

In 1998, Chief Historian of the Foreign Office Gill Bennett was commissioned by Foreign Secretary Robin Cook to get to the bottom of a mystery that had haunted the Labour Party - and British politics more generally - for over seventy years. This is the story of what she discovered.