Everyone involved in this investigation and this forum have made one basic assumption; that this was not a deliberate act. There is no evidence from an FDR or CVR to assist the investigation, so a lot of the evidence in the AAIB report has been inferred or cross referenced to other sources. Repeated cancellation of low fuel warnings may have been deliberate, and the botched auto rotation was certainly below the standard expected of an experienced pilot.
So if people want to nit pick over the minutia of the report, as to display indications and possible faults, it might pay to consider that perhaps the biggest fault lay with the pilot?
The AAIB quite rightly address the possible mechanical reasons for an accident, but if there are no real faults there, the cause must lay elsewhere.
These helicopters have been flying for years without a major accident being caused by them running out of fuel. A couple of near misses and major discrepancies between what the display read and what was in the tank, but no fatalities or serious accidents.
If the low fuel light comes on, land within 10 minutes - end of story. If you second guess the manufacturers instructions or decide to become a test pilot then that is gross negligence. That will be for the FAI to decide.
Having been involved on the periphery of police aviation, I have every sympathy with the crew and their families, but sometimes you have to call it as you see it. I had quite a few highly trained colleagues killed in high speed road accidents over the years, and it wasn't always their fault, except it was. They took the decision to conduct the pursuit or answer the emergency call and they were responsible for the speed they were driving at.
I was a passenger on one blue light shout in a Rover SD1 when we hit a cat that ran across the road. The impact destroyed the front of the car, which gives some idea of the speed we were travelling. The cat had a collar, with the name 'Rover'. No one injured, but the car was off the road and the driver suspended.
The point being, no call is urgent enough to have an accident. We were running to the scene of a suspected burglary, but other officers had surrounded and contained the scene. We were just bringing lighting for a search. So was it necessary to be driving at over 120mph down an urban city road?
The red light comes on - land, don't accept another tasking.