This is not speculation on the cause of the accident, as the aircraft should have been revoverable with or without power.
The fuel pickup on a Tiger is fixed (the tank in the upper centre section is the only tank) and if the aircraft is in a sustained attitude that allows gravity to draw fuel to an area away from it then fuel starvation can result. It does not use a weighted flop tube or multiple pickups.
A fuel situation of less than around 1/3 of a tank can allow this to happen. 1/4 of a tank is critical.
To all you hacks out there: This will not have caused the accident, merely the enigine cut on the way down.