The Queen has unveiled a tribute to code-breakers at Bletchley Park, the UK's World War Two cipher-cracking headquarters.
The Queen's visit to Bletchley began at 11am, a Buckingham Palace spokesman told ZDNet UK on Friday. The Queen will see the rebuilt Colossus and Turing Bombe machines used in the Enigma code-breaking process.
The BBC on Friday said the Queen visited with Prince Philip, and that some of the surviving codebreakers will be there at the ceremony.
"There is no doubt that [Bletchley] shortened the war by several years and saved many many lives in the process," Bletchley Park Trust director Simon Greenish told the BBC. "Some historians are beginning to think that perhaps it was the bit that made the difference."