The band have also confirmed a career-spanning compilation ahead of the shows, where they'll "celebrate this amazing journey we’ve all been on together"
They join Bloc Party, Sigrid and Yard act on the bill
They join previously announced artists including Sting, Stereophonics and Justin Timberlake
Other acts announced today include The Last Dinner Party, Sophie Ellis-Bextor, Scouting for Girls, Skindred and The Lottery Winners
The festival will return to the Southsea seafront in Portsmouth from August 23-25
The band will also play live performances in record stores across the UK
It's the first new track from the Leeds band in seven years
They’ll join Bombay Bicycle Club and Arlo Parks at the new outdoor event
Check out the "Indie Allstars" version of 'Chasing Rainbows'
TP