UPDATE 1 — UK PM Burnham says Iran's IRGC likely behind RAF Fairford incident
(Adds background paragraphs 2-3) LONDON, Oct 12 (Reuters) — British Prime Minister Andy Burnham said on Monday that a suspected plot targeting the RAF Fairford air base in Britain was "highly likely" to have been coordinated in Iran, and almost certainly directed by the Islamic Revolutionary Guard Corps. The incident n