The weather in the immediate vicinity of the Mull and the lighthouse just minutes before the crash can be clearly seen on the video taken by the holidaymakers. The evidence of the lighthouse keeper clearly confirms that conditions deteriorated in the time from the video to the crash occurring with visibility at the lighthouse estimated at 15 to 20 metres.
The only option in prudent airmanship would have been to turn away when visibility was less than 1km. They did not and then some 600m from land made the waypoint change.
They failed to do something which, in the circumstances, a reasonable person would not do or would do differently. They were negligent before the waypoint change.
Perhaps it would pay to reflect on the previously unpublished comments of the Stn Cdr at Odiham in his covering note to Day on his comments on the BOI:
"I have coo0nsulted the Officer Copmmanding No 7 Squadron and senior members of both No 7 Squadron's Special Forces Flight and No 27(R) Squadron. You may wish to know that there is a unanimous and strongly held view that the Board's most probable cause is incredible. Moreover, there is general agreement, that the crew, in some unknown way, 'got it wrong'".
Crawford was careful not to go the whole distance in his formal comments but clearly he and colleagues were of the view that this was human failings.