 Leslie Pym died on 17 July 1945, three days before his brother, Revd Canon Thomas Wentworth Pym, and, coincidentally, on the same day as Sir Edward Campbell, the member for Bromley, who was also posthumously elected.In the war-time coalition government, he was a government whip.Pym was not a descendant of the 17th century Parliamentarian John Pym.