I have been informed by a collegue in Flight Safety, who has contacts with the AAIB, that they are currently running with the idea that there was fuel starvation to both engines. It seems that only 10% of the fuel required was making it to the engines causing them to wind down. The problem however is identiying the part of the fuel system at fault.
I think that came out pretty early on...
from the AAIB initial report, Feb. 2008:
Data also revealed that the fuel metering valves on both engines correctly moved to the fully open position to schedule an increase in fuel flow. Both fuel metering units were tested and examined, and revealed no pre-existing defects.
Detailed examination of both the left and right engine high pressure fuel pumps revealed signs of abnormal cavitation on the pressure-side bearings and the outlet ports. This could be indicative of either a restriction in the fuel supply to the pumps or excessive aeration of the fuel. The manufacturer assessed both pumps as still being capable of delivering full fuel flow.
Investigations are now underway in an attempt to replicate the damage seen to the engine high pressure fuel pumps, and to match this to the data recorded on the accident flight. In addition, comprehensive examination and analysis is to be conducted on the entire aircraft and engine fuel system; including the modelling of fuel flows taking account of the environmental and aerodynamic effects.
Basically, there doesn't seem to be any new information; indeed, even the
speculation seems to be repeating itself now...