Its a pity no-one has responded with some into. I live in Northern Ireland but have been working all day and only seen your post just now. Maybe those in the know are worried about posting info about G8
I am not an expert on these movements but I will post what little I know for you.
Information is sketchy with nothing very concrete being released. I am mainly interested in the Japanese Air Force 747. It went over Carrickfergus at around 21:20 local on its way into BFS
and remains on the ground there now. The aircraft was 20-1102 and showed up on the internet radar sites as JF001, making a stop at Warsaw on the way from Japan.
Not sure about President O'Bama. Marine 1 + 2 have been here for a few days and were seen flying over Belfast on Friday morning in formation with other helicopters, Blackhawks or whatever they were, I'm not an expert on helicopters. I just recognized Marine 1 + 2 with their green and white scheme.
I have heard conflicting info about when US Air Force One (+ Two) arrive, one that they are already here, another that they arrive at 07:00 Monday morning. I think the Monday morning one is the most likely as roads are closed for him to drive into Belfast for a visit from 08:00 until 10:30.
As I type I have just run outside at the sound of an unusual aircraft, just seen TU
-64521 call-sign RSD031 Russia State Transport Company, possibly with Mr. Putin on board! Would have landed on runway 25 BFS
at around midnight.