The crane was there, it was known to be there by anyone who'd read the NOTAM.
It was required to be lit at night. It was hit by a helicopter in daylight .
The helicopter was flying in weather below the limits set for SVFR in the London Control Zone .
Why the helicopter got into a position to collide with the crane is known to only one person, who is sadly no longer with us, and unable to tell us why.
Shades of the Mull of Kintyre June 1994?
Just as then, the helo carries no FDR or CVR, so we will probably never find out exactly why this happened.
at least Capt Barnes doesn't have two vindictive bosses about to place all the blame squarely on him .