He was on a training run, it's got to be done on public roads because the instructor needs to see response to real world situations and ensure it's ridden to the Police 'system' and safe for the public. Let's be honest 110 mph on a motorway shouldn't have been a problem should it on a well maintained modern bike.
Cheshire Police put a speed limit on all their bikes (70 I think) after this crash and a similar fatal in Manchester which also involved a Pan on VIP escort training . In that I believe the suspension bottomed out on a bend causing a loss of control throwing the bike and rider into a parked vehicle, bit of rider error there perhaps ? I don't know the full facts so can't say.
I was told last week that the speed limit has been withdrawn as Honda had put the faults down to weight distribution and it had been cured, perhaps that will be reviewed after this Coroners comments.
Whether you're pro Police or not you've got to have 'em. I'd suggest getting pulled by an experienced Traffic cop who knows riding fast on a well maintained bike, in decent gear can be safe, beats any camera and can often result in nothing more than advice. ( North Wales excepted perhaps)
Sympathy to him, family and friends.