Some very interesting thoughts .....
Culpability
Compensation
Recklessness
Presumably the police want to interview him to establish the extent of the first, if any, in their view.
On compensation, I understand the insurance policies of war birds usually caps the liability out at a figure of x million. I would not be surprised if the amounts involved here are in excess of the cap.
On recklessness there are plenty of legal cases deliberating what the standard should be in cases of specialised occupations, eg surgeons. On the one hand it has been argued that the standard to prove recklessness should be a mistake that no other in that profession would have made. The profession here being Hunter Display Pilot.
My guess is that to establish culpability, compensation, and whether there was recklessness, this will eventually end up in the courts.