It commenced a gentle climbing right turn to 1,600 ft amsl, executing a Derry turn to the left and then commenced a descending left turn to 200 ft amsl, approaching the display line at an angle of about 45º. The aircraft then pitched up into a manoeuvre with both a vertical component and roll to the left, becoming almost fully inverted at the apex of the manoeuvre at a height of approximately 2,600 ft amsl. (emphasis added)
I would like to point out that the Interim Report did not speculate that this maneuver was or was intended to be a 1/4 clover. It was simply a "manoeuvre with both a vertical component and roll to the left."