(25 Dec 2014, 4:03 pm)Jimmi wrote Dan, I believe these are the brandings based on my sightings on the first day in service (I'm not sure about 4644 and 4645 but I think they both have branding for both the X26/X27 and X66).

4643 - MAX branding for both the X26/X27 and X66
4644 - unsure (I think it has branding for both the X26/X27 and X66)
4645 - unsure (I think it has branding for both the X26/X27 and X66)
4647 - MAX X26/X27
4648 - MAX X26/X27
4649 - MAX X66
4651 - MAX X66
4654 - unsure
4655 - MAX X66
4656 - MAX X66
4657 - MAX X66

I think 4646 is at Darlington but have no idea whether it has combined branding or X26/X27 branding - fleet list says it is still at Belmont in original livery.

(25 Dec 2014, 4:37 pm)tyresmoke wrote 4644 is a generic one, with both on the rear. Saw it the other day.
4646 is indeed Darlington based, think X26/X27 branding but not 100%.

(25 Dec 2014, 5:09 pm)Dan wrote 4644 was the only one which didn't match up with the list that I'd gathered based on information posted on this forum and photographs on Flickr, but if it's a generic one, it means I've got it right.

Didn't even have 4646 down as having been refurbished - but I've changed it to X26/X27 now.