A couple of weeks ago Mumford and Sons announced the release of their fourth full studio album, ´Delta,´ due out November 16th. For their first public performance in support of the ´Wilder Mind´ follow-up, the band appeared on last night´s edition of The Tonight Show Starring Jimmy Fallon, where they performed the new album’s lead single, “Guiding Light.” ´Delta´ promises to be a return to form for the band and fans will no doubt be excited to see them using acoustic instruments including banjo, to play the first track from their new LP.