Just a thought on this....Isn't Fairford one of the USAF,s designated airfields for "all things" strategic with regard to the operation of B1,B2,B52s etc.
Therefore, would it not be probable that the B1 will stay here for the appropriate repairs?.....I seem to remember a similar situation with a B52,during the second Gulf war, where an engine pylon suffered "ground damage" and the a/c was repaired on site.