Financial support for his research dwindled, his stipend from the MRC ended in 1936, and his laboratory was destroyed by a bomb in 1944. The University of London took this opportunity to deprive Twort of his post and research facilities. He was allowed to store the research equipment at his home in Camberley. In 1949, Penguin Books published his chapter on the Discovery of the Bacteriophage alongside a chapter on the Bacteriophage by Felix d'Herelle in the popular series Science News. Twort died on 30 March 1950.