MI5's advice to new recruits Avoid false beards, carry plenty of spare change and know what to do when you need to tell a taxi driver "follow that cab!"
However, far from the glitzy world of James Bond, the booklet is quick to dispel any notions of glamour among new recruits entering the world of espionage.
The guidance is contained in a booklet that was issued to all new spooks in the Security Service during the Second World War.
But the document has been declassified and is on show in a new exhibition focusing on the work of MI5 due to open at the National Archives, in west London, in the spring.
No false beards, 5'7 or 5'8, and follow that cab!
