Born Sylvia Margaret Harrison, the second daughter of Edith and William Reginald Harrison, a cotton broker of Liverpool, her younger brother Reginald grew up to become Oscar winning actor Sir Rex Harrison. She matched her brother for charm, while dedicating her life to the success of her husband David Maxwell Fyfe, whom she married in Liverpool in 1925. As well as caring for their three daughters, she provided wholehearted practical support throughout her husband’s political career, acting as his unofficial driver, and taking on his constituency business in Liverpool West Derby for the year he was away at the Nuremberg Trials. Letters between them exchanged during that time, formed the basis of a play by her grandson Tom Blackmore, Making History and later became the foundation of The Humans in the Telling a family project to commemorate the 75th anniversary of the Nuremberg Trials and 70th since the signing of the European Convention on Human Rights which charts her role in David Maxwell Fyfe's journey from Nuremberg to Strasbourg. The letters are now held at The Churchill Archive at Churchill College Cambridge.