It's SN56 AEG, a extra-long wheelbase 82-seat Volvo B7TL/Wright Eclipse Gemini new to Lothian, so it will have been well looked-after. Without being certain I would bet a pound to a penny that it belongs to Diamond Coaches of Rushden. They gave up all their registered bus services several months ago, but I think they still do schools work. The silver and blue Ensign-liveried decker is theirs as well.