Good luck if it works is all I can indicate - While the rules for 'fly ahead' are specific, some are often ignored, such as that for "same fare class": (
http://www.velocityfrequentflyer.com...memberbenefits)
22.5 Fly Ahead
22.5.1 In the event that a Gold or Platinum Member, who has a confirmed seat for a Virgin Australia Domestic flight, arrives at the Virgin Australia Lounge on the day of travel in time to be carried on an earlier Virgin Australia Domestic flight, the Member is entitled to make a request that they, and an accompanying guest in the same booking, be carried on that earlier flight (Fly Ahead).