As foreign secretary, Boris Johnson was a liability for the May government.
Theresa May's need to balance Brexiteers and Remainers in her cabinet means that the foreign secretary can get away with an alarming level of incompetence.
The 1954 defection of West Germany's first domestic spy chief and ardent anti-Nazi rocked the world – and then he returned to Bonn.
UK diplomats are thoroughly briefed on the pitfalls that could trap them on overseas service.
Theresa May's decision to make a Foreign Scretary of the notoriously troublesome Brexiter-in-Chief is a huge gamble.
New papers shed light on the aftermath of the dramatic flight of two of the notorious 'Cambridge Spies'.