Based on the 1st acoustic live of the song
youtube link: http://www.youtube.com/watch?v=6iCLuSfKwEQ
This is how Andy plays it (well at least to me)

Capo on 4th Fret

e|-----------------------------------3--5-3----3--5-0------------------------|
B|-0----3-3\1-0-----7----5-5\3-1-0-------------------------------------------|
G|--------------2-0----------------2-----------------------------------------|
D|---------------------------------------------------------------------------|
A|---------------------------------------------------------------------------|
E|---------------------------------------------------------------------------|

e|-0---------------------------------2---------------------------------------|
B|------3-3\1-0-----7----5-5\3-1-0-------------------------------------------|
G|--------------2-0----------------2-----------------------------------------|
D|---------------------------------------------------------------------------|
A|---------------------------------------------------------------------------|
E|---------------------------------------------------------------------------|

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| /   slide up
| \   slide down
| h   hammer-on
| p   pull-off
| ~   vibrato
| +   harmonic
| x   Mute note
| b   Bend
| pb  Pre-bend
| br  Bend release
| pbr Pre-bend release
| brb Bend release bend

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