Oh my, I've just done a bit of research, and this Solo that GNE have on loan is quite an interesting vehicle. For you see it is one of the 2 Optare Solo+ (https://www.flickr.com/photos/midlanddel...v2w-yTWDzy) to be built. The one in the photo was the electric version which was registered YJ09EZR. The one with GNE YJ10EZB was the diesel version of it.