The 'Ghosts That We Know' band are currently in the process of completing the follow-up to 2009's Sigh No More and have teased that the sophomore effort will be 'Black Sabbath meets Nick Drake'.
Lead singer Marcus Mumford said that the group enjoys trying out new creations during performances as they tend to take on a new life when played in the concert environment.
"Most of them, we're letting people hear as we've played live shows. We've kind of always just done that. We've kind of written a song and felt like we get it up to a point where it's ready to play live, and then we go... and road test it, see how it goes," he explained to MTV News.
"For us, we find that's a really helpful way of writing, and performing the song ideas that we have live is a crucial part, for us, of the songwriting process."
Mumford continued: "[The songs] always change when we play them live; the dynamics change a lot. When you play it to a new room, you're playing it to new ears, and you're listening to the song through their ears. So it's really great to feel the song out."
Watch Mumford & Sons' video for 'Little Lion Man' below: