(24 Feb 2017, 6:34 pm)tyresmoke wrote I'm not sure it is, that looks like the base for the "connecting Derby" livery to be used to combat Yourbus expansion in Derby. The new livery isn't expected to make an appearance until the summer.
Same livery on Arriva Midlands' bendy-Merc 5007:
5007 | Arriva Midlands Leicester | Mercedes-Benz O530G by Karol Koronowski, on Flickr