I might await more info this time before calling it terror. The guy (bloke) has not been identified in detail yet. In England, (or in the U.S. for that matter) it is conceivable that the driver with a pint or two too many, could have made a bad turn and not stopped appropriately at the signal (here, the manned gate).
I have had friends who served at Mildenhall. Let’s hope this is the end of it, for this episode.
....been there several times.