Tuning is Drop D
E|-----------------|
B|-----------------|
G|-----------------| x8
D|-----------------|
A|-----------------|
D|-55-33-11-00-----|
[ Tab from: http://www.guitaretab.com/a/alex-clare/335191.html ]
E|-------------------------------------|
B|-------------------------------------|
G|-------------------------------------|
D|-------------------------------------|
A|----------------------------55555555-|
D|-11111111-55555555-88888888----------|
Once you've played this tab on your guitar, you'll begin to notice it'll sound like the song.
Enjoy.
