Here are images from endoscoping the first cylinder behind the belt. The honing marks are still vividly visible. The vertical scratches seem quite ominous, though:
I also removed the rocker arms, so that I could determine if play was to be found between the cylinder casting and the camshaft.
The lobe nearest to the belt was damaged, as shown by the arrows. A sharp ridge of original height was left behind on the cam lobe. I will photograph this lobe, tomorrow when the sun hits the front of the vehicle
I could physically move the camshaft within its bore, when heftilly pulling the driving gear straight up and down. However, I couldn’t get it to noticably budge, when applying sideways pressure