Robert Hannigan, who was lauded for his role in striking peace in Northern Ireland, stunned Whitehall with his exit after just two years in charge of GCHQ.
GCHQ spy chief quit after he helped a paedophile Catholic priest avoid jail
Robert Hannigan, who was lauded for his role in striking peace in Northern Ireland, stunned Whitehall with his exit after just two years in charge of GCHQ.