Ok, two completely separate issues here.
Firstly, there was no denial of permission to take the photos AT
THE TIME THEY WERE TAKEN. Therefore you have no legal obligation to NOT publish and the decision is entirely yours. IMHO.
Now the CRITICAL MATTER.
This aircraft has been damaged to a non-airworthy condition (it was trailered back) and the "new owner" has stated he is going to put it back into flying shape.
1) Was the accident/incident reported as required?
2) Is the aircraft being "legally" repaired or will it become a "homebuilt" repair?
3) Could the aircraft then be sold to an unsuspecting buyer as No-Damage-History?
As you the photographer are aware of this, I believe it would be YOUR responsibility to give a telephone call to the relevant government office (It would be Transport Canada here in Canada, not sure about England) and make an enquiry about the accident (using the aircraft reg #). If the Gov't reports no accident, then LET THEM KNOW and they'll send an inspector around. If not, you could be setting in motion a chain of events that could have critical consequences. If the accident was reported, well no problem at all and you'll have a clear conscience.
As a licensed pilot and aviator, that's my suggestion that you report the accident and the situation just to play it on the SAFETY side. It's called being responsible.