Not saying there is or isn't cause for concern, but people start...

Not saying there is or isn't cause for concern, but people start new jobs everyday. Vaughan, going by his LinkedIn profile has vacated a few positions to take up the new role at BHP. BHP most likely required him to do so. Remembering in many cases in the Spec end of the market the positions held by Company personnel are consultancy/non full time positions.
Having said that I would have expected (as F&F stated) an announcement, but then we know these guys dont like spending money on announcements.
The next few days market action may provide more of an indicator as to whether stock os being offloaded.

I would assume Vaughan wont be in a position to disclose any information now as an outsider for fear of facing legal ramifications.