Lothian Buses bus 661G (ex-706) (SN04 AFA), seen here in the westbound lane of Saughton West Halt on the West Edinburgh Busway. Rather than operating a journey (the destination display is set to the buses' fleetnumber, not a route), it appears to be being shown off to dignitaries, although buses were operating at the same time - see this image of 626G passing in the opposite direction.