British leaders use spies and Special Forces to interfere in the affairs of others discreetly and deniably. Since 1945, MI6 has spread misinformation designed to divide and discredit targets. It has instigated whispering campaigns and planted false evidence on officials working behind the Iron Curtain, tried to foment revolution in Albania, blown up ships to prevent the passage of refugees to Israel, and secretly funneled aid to insurgents in Afghanistan and dissidents in Poland. Through bribery and blackmail, Britain has rigged elections as colonies moved to independence. Britain has fought secret wars and discreetly used Special Forces to eliminate enemies from colonial Malaya to Libya during the Arab Spring. This is covert action: a vital, though controversial, tool of statecraft and perhaps the most sensitive of all government activity. If used wisely, it can play an important role in pursuing national interests in a dangerous world. If used poorly, it can cause political scandal—or worse. In  Disrupt and Deny , Rory Cormac tells the remarkable true story of Britain's secret scheming against its enemies, as well as its friends. He reveals hitherto secret operations, the slush funds that paid for them, and the battles in Whitehall that shaped them.