Biffy Clyro announced as second Reading and Leeds headliner

The announcement was made by Zane Lowe during his BBC Radio 1 show tonight (February 4th).

Also announced tonight for the festivals are Foals, Jake Bugg, Fallout Boy, System of a Down, and Bring Me The Horizon. 

These acts join already announced headliner Eminem, as well as Deftones, Sub Focus and Mercury Music Prize-winners alt-J.

Reading and Leeds Festivals take place over the bank holiday weekend of 23-25 August.  

More acts - including the final headliner - are still to be announced. 

Leeds 2013 - more info

Reading 2013 - more info