Ok, so this is what is known as an oblique head-on. The complete distortion of the passenger cell, including a-post and door tells me this was not hit by a car. Without a doubt it was something of similar height or bigger so agree on the lorry or van perspective. As to euro n-cap testing, and having seen more smashed cars and the people who have not walked out of them (or done anything in life ever again), if you are hit by a lorry it is highly unlikely you will come out of it well, euro n-cap of 6 or not. I have seen cars that have been physically opened up and peeled apart after impacts with lorry's, so even though it is a colossal impact, and the kinematics of such would have been horrific, the van has actually stood up.
As to whether anyone was in the van at the time, in my professional opinion, it was empty.
What tells me this is:-
we do not leave body's in vehicles when they go to the recovery yard. Even if a fatality was involved, the body would still have to be cut of the interior, it doesn't just slide out because it's dead. To do this the same hydraulic tools are used as you'll all have seen on programs and other media. These make big cuts and spreads. If a person or body had been taken out of the drivers door then the door would not have shut afterwards. Due to the level of damage if I was faced with the extrication plan for the occupants I would go in through the passenger side, but this would involve spreading/ jacking/ winching the dash back out of the vehicle for "space creation", again, the interior would not look like this. The final thing that tells me that no one was in the front of this vehicle is the lack of body fluids.
Therefore this was either a staged crash where it was deliberately hit for testing or other purposes, or the vehicle was parked when mullered.