I called the dealer i purchased my st from about the update, the service manager told me an update is now available, they told me the car needs to be connected to a cpu & updated, I asked about the cost & he told me it is a warranty recall so my st is booked for this friday for the update.
After booking my car I then called ford au asking about the sat nav update & the person i spoke with told me its a new card plus cpu time.
So it will be interesting the outcome, but going by what i was told by the service manager it should be no cost, i will update the outcome after i pick up the car