Editorial : The widely-criticised Defence Investment Plan may be a small step in the right direction, but is underfunded, overdue, and thus a strange reflection on the priorities of a prime minister who claimed to put deterring Britain’s enemies first Sign up for our free Voices newsletter for expert opinion and columns Sign up for our free weekly Voices newsletter for expert opinion and columns Sign up to our free weekly Voices newsletter Email * SIGN UP I would like to be emailed about offers,