Those who know about the BA flight to NAS are not saying. The B772 can operate into NAS, it was the shuttle to cayman which was more problematic. Depending on the day of the week the local BA engineer is being trained on either the B777 or the B787. First is not a priority on this route so I'd guess a B788 will ultimately be deployed. As it stands the B767 has had a further stay of execution until the end of 2016.