From the publisher:

"Fnugg is one of the most popular compositions for tuba solo of all time.

Fnugg Red is a variation on this song and was originally written for tuba, trombone and orchestra.

This is a version for trombone/euphonium, tuba and was premiered by Ben Pierce and Oystein Baadsvik at the Asia Tuba Euphonium Festival in 2017."

Watch it here! https://www.youtube.com/watch?v=khoIQWMWPQ8