Eileen Muriel Younghusband, BEM (née Le Croissette; 4 July 1921 – 2 September 2016) was a filter officer in the Women's Auxiliary Air Force in World War II. She worked in the filter room, a top-level British air defence hub which assessed radar reports in order to give air raid warnings. Later, while posted to Belgium, she was part of a team of mathematicians who alerted Allied forces to the location of V-2 rocket launch sites. Younghusband completed a university degree at the age of 87 and subsequently published three books about her wartime experiences: two memoirs and one children's book.