The little riff played throughout the song, tabbed by ear. Sounds right to me.
E|-9--9--9--9--10--10--10--10---|
B|--10-10-10-10--10--10--10--10-|
G|------------------------------|
D|------------------------------|
A|------------------------------|
E|------------------------------|
[ Tab from: https://www.guitartabs.cc/tabs/a/angus_and_julia_stone/old_friend_tab.html ]
E|-9--9--9--9---5--5--5--5------|
B|--10-10-10-10---8--8--8--8----|
G|------------------------------|
D|------------------------------|
A|------------------------------|
E|------------------------------|
The sun it burns so i'll jump right in...
E|-5--5--5--5--5--5--5--5-------|
B|--8--8--8--8--8--8--8--8------|
G|------------------------------|
D|------------------------------|
A|------------------------------|
E|------------------------------|
It's just these two notes until the end of the bridge, then its back to the main riff.
Listen to the song and you'll pick it up.
Enjoy.
