"My grandmother had the sheer audacity to 'talk back' to the Gestapo," her eldest granddaughter Nicole said.
"When she was condemned to death on not one but two counts - the first for being a French Resistance worker and the second for being an English spy - she instructed them to make up their minds because she could only die once.
"Even after all the pain and torture they could never break my grandmother's spirit and throughout her life, she always felt equal loyalty to both France and England."
After the Second World War, Ms Sansom worked to promote the importance of female SOE agents during the war.
She also co-founded the International Women's Day Lunch because, as her granddaughter put it, 'she wanted to ensure that these women - her comrades - were always remembered'.