CYPHER

Top secret coded messages were sent from this room.

It was such a sensitive area that the operator was locked in the room and an armed guard was stationed outside.

The room which contained this machine contained nothing else and only one member of staff.

ENIGMA

The Secret War

The war's most secret messages were sent to this equipment from Bletchley Park where they had been decoded from the German ENIGMA Machine.

This machine was under armed guard and the operator locked in when in use.

Entrance	The RAF Plotting Room	The Plotting Control Room	Secret Hotline
Commander in Chief	Projector Room	Switchboard	Cyphers, Codes and Enigma

History of the Building
Personal Memories
The role it played
Diary of a Wren
Battle of the Atlantic
Tour the building
Battle of the Atlantic - from BBC History