John Healey’s departure is less of a surprise than it might seem

Despite his managerial veneer and quiet approach, outgoing defence secretary is a highly political operatorUK politics live – latest updatesIf there was one thing for which Downing Street could rely on with John Healey, it was avoiding unnecessary drama. Whether in parliament or on the morning broadcast round, his sober suits and general demeanour of a benign but firm headmaster spelled reassurance.But then just before 12.10pm on Wednesday, the drama arrived. In a letter posted to social media, Healey resigned as defence secretary, a job he had held – whether in government or its shadow equivalent – from the moment