Trim Stab: as far as I can see, not everyone here would agree that the final manoeuvre begins at the 200 ft point, nor does the AAIB report 'state' that.
Have another look at the diagram in the AAIB report: it is true that the aircraft dips down to 200 ft before the final manoeuvre, but it could be argued that that is not the beginning of the manoeuvre.
See the dip down to 100ft before the preceding Derry roll: that point of 100 ft at the display line is similarly not the beginning of the Derry roll.
Surely it must be possible and allowed for display pilots to dip down to 100 ft or 200 ft *in between* manoeuvres.