Biffy Clyro, Reverend and the Makers and White Lies are amongst the latest names released for Mencap's Little Noise Sessions.
Adele, Friendly Fires, Katy Perry, Angus and Julie Stone and Frank Turner have also been confirmed alongside Sergeant, General Fiasco, Fight Like Apes and The Hours.
Today's additions join the likes of Razorlight, Stereophonics, Kasabian and Keane, who will all be performing stripped back sets at the Union Chapel, Islington in London from 8-18 November.
Fans wishing to attend must register at Mencapmusic.org.uk before Thursday (16 October). Proceeds from ticket sales will go to the charity Mencap.
The full line-up reads as follows:
Cage The Elephant
Florence and the Machine
Angus and Julia Stone
Reverend and the Makers
Fight Like Apes
Red Light Company