happened to my 08 197FF at about 16k, just took it in, said I thought it was a synchro mesh - they phoned back and told me they were replacing the whole box. Took about a week before I got the car back. The new box has a longer gearing so no more 70mph @ 4000rpm. (now 3400rpm).
Garage was Arnold Clark Bishopbriggs.
Garage was Arnold Clark Bishopbriggs.