The Ministry of Defence wastes up to £94 million a year training 16 and 17-year-old army recruits for roles which could be filled by adults, campaign groups have said.
According to a report by Child Soldiers International and ForcesWatch, it costs as much to train a 16-year-old as an 18-year-old.
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A new national security communications unit to counter fake news and disinformation by foreign states is to be set up by the Government.