Entwisle originally studied physics under Ernest Rutherford, but was able to attend engineering classes in her second year when they were opened to female students.

[1] Entwisle's Oxford Dictionary of National Biography entry states that it was noted on her student card that she was to be married in the month of her graduation in 1914.

[1] In 1915, at the beginning of the World War I, British Westinghouse (later Metropolitan-Vickers) was looking into the recruitment of women engineers to manage the shortages of skilled technical employees at the time.

[5] The Chief Engineer John S Peck (who had taken out patents on electrical distribution systems[6]) had approached the Manchester College of Science and Technology to enquire about suitable candidates, and when the invitation came to Entwisle's attention she joined the company, working first on test results and then on the design of DC motors.

[7] During World War I, Entwisle spent her weekends nursing in a Red Cross hospital and also attended evening classes at Manchester College of Science and Technology.

[1] Being an umarried woman, Entwisle was able to continue working at British Westinghouse (later known as Metropolitan-Vickers) after the war's end as they did not hire married women.

[1] In a speech encouraging girls to take up engineering as a career, given in Portsmouth in the mid-1950s, she noted that "We are no longer at the stage when the appearance of a woman in the shops makes the whole place stop work, as it did when I started".