In her Inspirefest 2015 keynote, Kerry Howard, writer and Bletchley Park researcher, focused on three of the 6,600 women who worked at code-breaking institute Bletchley Park — Margaret Rock, Mavis Lever and Joan Clarke.

Rock, Lever and Clarke each arrived at the Park in April 1940.

In addition to discussing key similarities between the three women — each had strong, supportive families and a strong, supportive school network — Howard also described their life and work at Bletchley Park.