Seems fairly straight-forward to me ?
Not to me it isn't, and given you (nor indeed nobody else previously heckling) have not offered further insight perhaps it isn't that straight-forward.
There were two Go-Pro cameras that filmed the accident (in fact they continue to film post accident) the footage of which has long been seen by the AAIB but according to reports (such as the BBC link below) following the coroner pre-inquest review such footage is subject to restricted access.
Why is that?
Shoreham crash: Police go to High Court to see evidence - BBC News