Guess there's no thread for demonstrator buses, so here it is.
I'll start.
Demonstrator - Volvo B5TL MCV/Evoseti, BF65 WHZ, loan to University of Wolverhampton. There are pictures of the interior, too.
https://www.flickr.com/photos/135924909@N05/25844057784/
Demonstrator - Optare Metro Decker, YJ65 EPU - loan to University of Wolverhampton. There are pictures of the interior, too.
https://flic.kr/p/FwFboD
North Bridge, Edinburgh
YX19 OWA - on loan to Borders Buses
https://flic.kr/p/2fKFPQt
Rather chuffed that I managed to snap this one; it crossed the bridge almost 10 late, so I had begun to doubt if it was indeed out at all. It still carries fleet number 303 from its time with Transdev, hence why I haven't listed it as Borders' fleet number.
After a bash in Swindon today managed to stumble across the ADL Enviro 200 EV demo in Oxford
Here it is turning into the station on Park and Ride Route 500
https://www.flickr.com/photos/128470593@N05/48122014033/in/dateposted-public/
Not sure if it counts, if it's now a former demonstrator? 😂
North Bridge, Edinburgh
YX67 UZB
https://flic.kr/p/2hnoRKm