An intrepid employee, Bernard Lynch, attempted the first static ejection on 24th January 1945. He then conducted the first mid-flight test ejection on 24th July 1946. He ejected himself from the rear cockpit of a specially modified Meteor 3 at 320 mph, 8000 ft in the air. Bernard Lynch made a perfect landing and subsequently made a further 30 ejections.
Not sure what period this covered, or his age, but he must be a possible candidate.