The new song was influenced the band recently receiving the prestigious John Steinbeck Award at San Jose State University.
Inspired by American author John Steinbeck, the new track is the band's first new music since 2018's acclaimed 'Delta' album.
First released in 2009, 'Sigh No More' has gone onto become one of the decade’s most enduring releases with over 7 million in sales worldwide.
Tour support comes from Australian indie rock band Gang of Youths, with special guests Portugal. The Man and Lord Huron.
'Woman' also features on the band's fourth album, 'Delta', which topped the US Billboard 200 on release.
The group perform the tracks ‘Forever’ and ‘Guiding Light’ in the six-minute mini-doc.
The video was directed by Directed by BAFTA-nominated and fast-rising young British filmmaker Charlotte Regan.
The new, seven-date run kicks off on 3 August at the Banc of California Stadium in Los Angeles, California.
'Wasteland, Baby!' is the first rock album to lead the Billboard 200 since Mumford & Sons’ 'Delta' debuted at No. 1 on the 1 December, 2018-dated chart.
The new single is the second to be taken from the band's Billboard chart-topping album 'Delta'.
The band's two previous albums 'Babel' and 'Wilder Mind' also topped the prestigious North American chart.
The band's shows in Liverpool, Cardiff, Sheffield and Manchester will instead be rescheduled for 2019.
'Guiding Light' is the first single to be taken from the band's new album 'Delta', due for release on 16 November.
The tour is in support of the band's fourth album 'Delta', released on 16 November.