Cryptanalysis of the Enigma Bletchley Park to describe the network that used the same Enigma setting sheets. Initially these were recorded using coloured pencils and were given the names "red", "light blue" etc., and later the names of birds such as "kestrel". During World War II the settings for most networks lasted for 24 hours, although towards the end of the war, some were changed more frequently. The sheets had columns specifying, for each day of the month, the rotors to be used and their positions, the ring positions and the plugboard connections. For security, the dates were in reverse chronological order down the
That Was the Week That Was news. Frankie Howerd also guested with stand-up comedy. Script-writers included John Albery, John Antrobus, John Betjeman, John Bird, Graham Chapman, John Cleese, Peter Cook, Roald Dahl, Richard Ingrams, Lyndon Irving, Gerald Kaufman, Frank Muir, David Nobbs, Denis Norden, Bill Oddie, Dennis Potter, Eric Sykes, Kenneth Tynan, and Keith Waterhouse. The programme opened with a song ("That was the week that was, It's over, let it go ...") sung by Millicent Martin, referring to news of the week just gone. Lance Percival sang a topical calypso each week. Satirical targets, such as Prime Minister Harold Macmillan and Home Secretary Henry Brooke