Doughty uses a fretted G5 for the G, and a fretted F1 for the chorus. Not sure of the absolute
terminology, but here are the corrections below:

C (x32010@1)  Am (x02210@1)  F/G (303211@1)  Ge---3-----3-----x-----0-| (320003@1)B---1-----1-----1-----0-|
G---0-----2-----2-----6-|
D---2-----2-----3-----7-|
A---3-----0-----x-----7-|
E---x-----x-----x-----5-|

then, in the chorus, he uses F as such:

Am (x02210@1)  Fe--3-----1-| (133211@1)B--1-----1-|
G--2-----2-|
D--2-----3-|
A--0-----3-|
E--x-----1-|

*thanks to myles@virtualmyles.com who did all the work, I just cut and pasted...