The band will now play a 14-date UK tour during April 2020 in support of their 'A Billion Heartbeats' album.
The September 2020 trek includes shows at Nottingham Arena and London's 02 Arena.
The legendary artist will perform his new record, 'Free' in its entirety at The Barbican Centre on Thursday, 21 November.
The song's lyrics explore themes of responsibility and freedom at this time of climate crisis.
Directed by Simon Taylor, the clip was shot on location at Sweat Records in Miami with a special appearance by Ale Campos from Las Nubes, Miami.
"Serge Gainsbourg's writing will always be an inspiration for us – he’s a present who is always there when we’re writing and composing.”
The enduring singer-songwriter's sixth album in just four years, the new record is due out on 25 October.
The postponement is due to frontman Blaine Harrison requiring emergency surgery.
The new song is taken from the band's upcoming album, 'A Billion Heartbeats', set for release on 27 September.
The new album was recorded with Grammy Award winning producer John Congleton (St. Vincent/Sharon Van Etten/War on Drugs).
The rousing new track arrives ahead of the band's new album, 'A Billion Heartbeats', which is out on 27 September.
The band's new album is set for release through Caroline International on 27 September.
The sparse new track is taken from the star’s upcoming solo album Free, which is due out on 6 September via Loma Vista.
Frontman Blaine Harrison says, “I was born in the NHS and it has saved my life several times over."
The band will be playing their debut album 'I Had The Blues But I Shook Them Loose' in its entirety at their November shows.