(24 Jan 2016, 6:37 pm)Jimmi wrote I spotted two in November/December on normal weekday workings in the form of 156479 and 156484.
https://flic.kr/p/ANspfG
https://flic.kr/p/A9vK95
I have had 2 or 3 and seen some heading in the opposite direction when on a 142. Seen them at Darlo, when heading south or if kicking about on Teesside.
Unfortunately, I haven't always noted which ones were operating the routes.
Maybe should have done, to see if there had been some swaps.