There has been a lot (an awful lot) of theorising about fuel starvation and how bizarrely both engines could stop at the same time due to lack of it.
My guess reading the AAIB special is that fuel is not the issue. Just like their reference to mechanical issues or the lack of them, the mention of 95lts of fuel being removed is meant to indicate that lack of fuel was not the problem.
Now it may be that lack of fuel will prove to be the problem but not because it was not in the tanks but because it could no longer get to the engines.
This is a fact the AAIB could have covered in its bulletin but did not because clearly further investigation is required. By this I mean the engine fuel switch positions.