Mustang Sally

I was on VS12 last night in seat 7 k & when we were rolling out for take off I noticed behind the BA 747 on the next gate to us was a Virgin 747 (Mustang Sally)parked on the Air France Gate. Obviously there is only one Boston flight so was this flight diverted for some reason?
It brought back good memories of the 747's doing the summer run into Boston with four fine engines under the wings & a better UC cabin.
It brought back good memories of the 747's doing the summer run into Boston with four fine engines under the wings & a better UC cabin.