According to the Telegraph, the venerable Capt 'Winkle' Brown, who was there, is suggesting pilot error.
I suppose you'd have to call that 'expert opinion' - if nothing else...
As for Mr Sharp on the BBC interview, the least said, the better.
That's probably an indication of his ingrained depth of knowledge and ability to read the circumstances from the footage he's seen, however, we shall see, as the saying goes. I'm referring to Captian Brown of course!
FB