"In Northumbria for example, where the aristocratic French Musette (itself derived, supposedly, from folk prototypes in Brittany) was adopted by certain the native musicians to become the Northumbrian Smallpipe," (IB)

No, sorry. The likelihood is that hummelschen (a small quiet bagpipe)played in the low countries in the C16/17 were brought back by mercenary soldiers, and became the basic nsp. These were then developed over 200 years (with nods in the direction of the musette and lots over other influences) to become modern nsp.

They're not a national instrument. They're a regional one. I don't think there is a national one.

Paws