(09 Sep 2015, 1:07 pm)C265XEF wrote Optare Solo MR720 R6STX on Cathedral service today.In full fleet colours. First time I've seen it, was on my lunch break at the time.
R6STX, Isn't that a Volvo Olympian?
Do you maybe not mean R2STX which is usually on the R5 (pictured below).
Stanley Travel: R2 STX by Jimmi's Transport Photos, on FlickrThe only other I can think of they may have either bought another Solo and given it that registration or they have repainted and reregistered KX15BLZ.