David Allen is a British musician known for his contributions to the progressive rock genre. He was a founding member of Gong, a band that incorporated elements of jazz and space rock, and is noted for its complex compositions and fantastical lyrics. Allen's distinctive psychedelic guitar work and vocals are often associated with the Canterbury scene of progressive rock. His influential works with Gong, such as the "Radio Gnome Invisible" trilogy, helped shape the sonic landscape of 70s rock music.