Bletchley Park Day
This was the date that ‘Captain Ridley’s shooting party’ arrived at Bletchley Park in 1938 – a cover name for the first visit by the Government Code & Cipher School, and others from MI6.
‘Captain Ridley’s Shooting Party’ resulted in the Government Code & Cypher School (GC&CS) opening at Bletchley Park. They came for three weeks in 1939 and returned the following August for the duration of the war, with the first stage of the SIS (Special Intelligence Service) moving there on 15th August 1939