I felt really sorry for the pilot as I do not reckon the poor guy made much of a mistake.
Other than flying into a known, notified structure, destroying it and the aircraft, killing himself, immolating a pedestrian, injuring others, and causing millions of pounds in damage, clean up, repairs and investigations, as well as major transport, travel, construction and social disruption, not much of a mistake at all!
"Mistakes" have consequences!
I passed The building in question and without doubt it is a hazard to aircraft.
The aircraft created the hazard by not avoiding the building.
Remember it was such a Crane which brought an aircraft down because the pilot did not see one arm angling off it.
The Crane did not strike the aircraft, the aircraft struck the Crane, as such I believe that had the pilot survived, he may have been charged with Manslaughter for the death of Matthew Wood.