sentences:  When George Lansbury (Labour Member of Parliament (MP) for the Bow and Bromley division of Poplar) died in 1940, Key was elected at the Bow and Bromley by-election to follow him; he was opposed only by a Communist candidate in the byelection.From 1941 until the end of the war, Key was Regional Commissioner for the London Civil Defence region, with special responsibility for shelters.In Clement Attlee's post-war government, Key was appointed Parliamentary Secretary to the Ministry of Health.