Britannic Lands is a song composed by Ken Arnold and used in Ultima V: Warriors of Destiny. The tune sounds like it is meant to be played on a harpsichord.
The title comes from the jukebox in the Apple II version.
Ultima V: Warriors of Destiny (A2)
Britannic Lands plays whenever you're walking around in the land of Britannia.
Ultima V: Warriors of Destiny (C64)
The Commodore 128 version of Ultima V plays Britannic Lands in the same places as the Apple II game.