The acoustic take on the classic single is taken from the full album due out later this month.
The Scottish legends will hit the road this September in support of their new stripped-back live album.
It's Biffy, but much quieter.
This is what you can expect from both bands at festivals this summer.
Interested in crazy visuals, bouncing crowds and beards? Step this way...
It just got even bigger.
This is exciting.
The countdown continues.
This is cool.
Here we go.
Biffy Clyro at Reading Festival was awesome. Here's what we learned watching their all-conquering headline set.
Biffy Clyro registered another classic Reading Festival set on Sunday.
This is interesting.
This is gonna be fun.