Sasless
What about my theory
I'd also like to comment on the lack of autorotation theory. The final route of the aircraft was 180 out from its final resting orientation. It came over a high building attached to the rear of the pub.
What if autorotation was successfully entered albeit with rrpm on the low side. From 1000 at night over a city, there is very little time and few options to choose from. What if at the final stages you are faced with a large building. Crash into it of flare and use some collective. Survival instinct would be that you flare. You've now used our one shot of collective but you fall with no rrpm over the other side of the building.