Absolute Radio's Adrian Hieatt talks to Biffy Clyro at the 2009 V festival at Hylands park in Chelmsford. They discuss their Secret Stage appearance, their 5th album and new single.

Video for the single from puzzle

Machines from the album Puzzle

Biffy Clyro perform an acoustic version of their song, Many of Horror.

For Radio 1's Live Lounge

Video for single from the album Puzzle