With Keir Starmer having rid the Labour party of its Corbynite doctrines, Britain’s independent nuclear deterrent would not be expected to feature much in the coming general election campaign. But will that change after the failed test firing of a Trident missile, for the second time in a row? The missile, which was launched from HMS Vanguard off the east coast of the United States in January, was intended to travel to the edge of space before landing in the middle of the Atlantic.