The singer told BBC 6 Music that the folk group plan to have the follow-up to 2009 debut LP Sigh No More completed before the year is out.
Songs currently in contention for the new record include 'Lover Of The Night' and 'Whispers In The Dark', which the band debuted at their recent XFM live session in London.
"We've got a few more that are around the periphery," Mumford said. "We haven't had much of a chance to get in a rehearsal room and actually play them through so we play them in soundchecks.
"We're hoping to be in the studio this year. The songs are coming and it feels natural."