(25 Feb 2014, 6:30 pm)Tom wrote 4989-4992 were never in ''The Nine'' livery! It was 4945-4948 I believe, with 4948 in a purple colour with Go North East vinyls applied.
Photo © Matt Williamson - 4946
Photo © emdjt42 - 4948
Yeah, you're right, have no idea why they are shown in this livery, unless the coding for X36 and X37 was the same.