Originally Posted by
Tailspin Turtle
It looked to me from one of the videos that the roll intended to change the axis of the loop was accomplished before the airplane was vertical.
I suppose it depends on how you interpret the AAIB's finding that
"as it approached the vertical, the pilot initiated a roll to the left"
There is no suggestion in the report that the roll was started earlier than planned.
That would have displaced him farther along his run-in axis than if he had planned to roll in the vertical, resulting in him being beyond the line he wanted to be on at the bottom of the loop (and therefore lined up with the road rather than offset east from the runway)
Another, simpler, explanation (and the one offered by the AAIB) was that the 60° roll was more than intended, thereby offsetting the loop axis by a correspondingly greater amount away from the display line.