I'm just doing this quickly but it sounds about right to me if you just wanna play it 
a singalong, it's a pretty simple song but a brilliant one too!

For the intro:
e|---------------------------------------------------------------------------|
B|---------------------------------------------------------------------------|
G|---------------------------------------------------------------------------|
D|---------------------------------------------------------------------------|
A|----------7---------5---------3--------------------7---------5---------3---|
E|3----------------------------------------3---------------------------------|

For the bit after the intro and for the rest of the song you can use this, just change 
strumming pattern slightly for the different parts

e|33333-33333-77777-77777-55555-55555-33333-33333|
B|33333-33333-88888-88888-77777-77777-55555-55555|
G|44444-44444-99999-99999-77777-77777-55555-55555|
D|55555-55555-99999-99999-77777-77777-55555-55555|
A|55555-55555-77777-77777-55555-55555-33333-33333|
E|33333-33333-xxxxx-xxxxx-xxxxx-xxxxx-xxxxx-xxxxx|

Hope that is okay, I did this from the full band version of the song so there are parts 
hes not even playing anything.