This bus paper model is the Dennis Dart from paperdiorama.com. The scale of this bus papercraft is 1:87. The Dennis Dart is a rear-engined midibus built by Dennis in the United Kingdom. More than 11,000 were built during 18 years of production.
It has proved popular with many bus operators in the UK, and has since been sold in several other countries around the world.
You can download this bus papercraft from here: Dennis Dart Portsdown Bus Paper Model Free Download