Pettigrew was born 27 February 1898 in
Bermondsey in London to William and Ellen Pettigrew and had one surviving elder sister, Ellen. Her father had been in casual work as a
sealskin dresser, but soon after she was born the family moved to Westminster and both her parents became proprietors of a chandler's shop. Her mother Ellen Pettigrew continued with the shop after her husband died in 1915. Kathleen Pettigrew attended
St Martin-in-the-Fields School for Girls until 1906. After training as a secretary from when she was 14, probably at Pitman Metropolitan School, Kathleen Pettigrew started work at 18 in 1916, in the London Metropolitan
police Special Branch during the
First World War. Her sister already worked as a registry clerk there. She accompanied at least one of them,
Stewart Menzies at meetings with
Winston Churchill. During the
Second World War she was involved in message transmission within
Bletchley Park as well as communication with overseas field agents. She was a key point in the flow of information to and from the head of MI6 and at times acted independently on his behalf. In retirement she lived in
Sidmouth, Devon but was still sometimes called upon for her historical knowledge of MI6. == References ==