Robert Hannigan’s surprise departure leaves a large hole to fill at GCHQ
The early departure of Robert Hannigan as GCHQ chief, announced today, marks not so much the end of an era as the transition between eras. The agency's famous HQ in Cheltenham, a metallic doughnut the size of Wembley Stadium, might look futuristic but was designed in the late 1990s before anyone worked out just how much data the intelligence services would have to intercept and analyse. Or how much of espionage would involve codebreaking, and on such an unprecedented scale. The workload exploded as it opened in 2003 and suddenly a GCHQ designed for 5,000 staff looked too small. New ways of working were needed. Hannigan was brought in, as outsiders occasionally are to GCHQ, to administer some course correction.