They also enlisted Minogue to perform their giant hit 'Chasing Cars'
The pop icon said that the “story behind the song was irresistible” and called it a “total honour” to be asked to collaborate
The couple previously split in 2015
Including tracks by Girls Aloud and Gary Lightbody
They will also headline In It Together in Port Talbot and Splendour Festival in Nottingham
The Glasgow event kicks off tomorrow (July 11)
The letter, co-signed by Elton John, Coldplay and Central Cee, calls for a £250million package to "repair decades of dismantling music"
Fontaines D.C., The Script, Gracie Abrams, Inhaler, Confidence Man, Kneecap and more are also set to perform at the festival
"We’ve heard so much about the ‘forest shows’ from other artists that have played them and we’re excited to play some ourselves next summer"
Tickets go on sale later this week
SPSP