The Plaxton Primo is a type of small low-floor bus based on the Enterprise Bus Plasma. It was launched by Plaxton in 2005. It is the result of close co-operation between Enterprise Bus Ltd (the chassis manufacturer) and Plaxton. The fully-welded stainless steel integral chassis final assembly is supplied in right hand drive format as a running unit to Plaxton. Final body assembly is undertaken by Plaxton in Scarborough (UK). The body and chassis design is also available in both one and two door left hand drive form.