Mike Thomson presents the series using documentary evidence to throw new light on past events. In May 1964 prime minister Sir Alec Douglas-Home declared in the House of Commons that British policy in the North Yemen Civil War was one of non-intervention. But with the security of British interests in Aden and South Arabia under threat, rumours spread of London's covert involvement in the war. Mike unravels the extent of Britain's underhand engagement in the region, told through high-level secret Whitehall documents, private papers and eyewitness accounts. As Yemen returns once more to the news headlines, Mike looks back at Britain's policy in the 1960s that went on to have far-reaching consequences for the Yemen of today.