Prestwick was always interesting, been there a few times. The crossing Ireland in Air Force (one) is mind bending. Now with the lack of traffic (guests), and Dublin's Sin ( Mike Pence definition) it makes sense.
GB from a security standpoint makes perfect sense. From a logistics standpoint makes none. Now there are very secure locations in Dublin, however Pence would not like them is my opinion. In my old job I would have said tough S__t, enjoy Dublin's sin
“Better a true enemy than a false friend.”