JOHN COVENTRY served over 13 years as manager of East Thurrock United – but has survived just three-anda-half months in the dugout at Great Wakering Rovers.The veteran boss has left the struggling Isthmian North side after just one win from 12 matches –a run which has left them drop to within three points of danger with four matches remaining.‘Covo’ joined the Rovers set following a coaching stint at Aveley and initially made a positive impact at Burroughs Park.But Rovers opted to press the panic button after Tuesday’s night 3-1 home defeat by H...