Blackett war ein führendes Mitglied einer Gruppe von Wissenschaftlern, die Wissenschafts- und Forschungspolitik diskutierten, als die Labour Party in der Opposition war. ###>He was the senior member of a group of scientists which met regularly to discuss scientific and technological policy during the 13 years when the Labour Party was out of office, and this group became influential when Harold Wilson became leader of the Party.