This is the verse and the chorus is a variation of this strummed.
( Tab from: http://www.guitartabs.cc/tabs/r/rosie_thomas/wedding_day_tab.html )
[D] [A] [G]
e|-------------------------------------------------------------------------------------|
b|-------3---------3-------------------------------------------------------------------|
g|-----2---2-----2---2-------2--------2----------0---------0---------0---------0-------|
d|---0---------0-----------2---2----2---2------0---0-----0---0-----0---0-----0---0-----|
a|-----------------------0---------0---------------------------------------------------|
E|--------------------------------------------3---------3---------3---------3----------|
( Tab from: http://www.guitartabs.cc/tabs/r/rosie_thomas/wedding_day_tab.html )
[D] [A] [G]
e|-------------------------------------------------------------------------------------|
b|-------3---------3-------------------------------------------------------------------|
g|-----2---2-----2---2-------2--------2----------0---------0---------0---------0-------|
d|---0---------0-----------2---2----2---2------0---0-----0---0-----0---0-----0---0-----|
a|-----------------------0---------0---------------------------------------------------|
E|--------------------------------------------3---------3---------3---------3----------|