It looks like BFS management's 'Vote to Leave' advertising campaign in the Republic has paid off. 600,000 Irish passengers is a pretty impressive figure given that DUB is more convenient than BFS for most people in the border counties.
On a more general note; given that the July rolling 12 month figure is 5.73 million passengers, it seems a real possibility that next year BFS will handle 6 million passengers for the first time. Passenger figures for this year have already surpassed two targets (5.4 million and 5.6 million), and will almost certainly surpass the current target of 5.8 million passengers. That's a pretty amazing achievement given that just 3 years ago passenger numbers were stagnated at just 4 million.