N377NW A320 Northwest Airlines (Prestwick 22-11-03).
The was the first Northwest Airbus 320 to be delivered through Prestwick in their new colours enroute from Toulousse to the States and the last one of this type was in July 2002.
It landed on runway 13 at 11-10am and came off at the first link so I took this shot of it as it taxied to the Terminal for fuel before heading off again at 11-50am with a next stop of Gander.