Hello :) This is Great Wide North - Flags, amazing song! You can play all D chords 
as Dsus4, both sound great :)

Intro G Cadd9 x2
G
Time has come to open our eyes
Em7
Yesterday is gone, It will never come back
Cadd9
The sun is coming up
D(sus4)                       G      Cadd9  D
The sun is coming up on the horizon


G
All the mistakes we have done before
Em7
We must turn to face them and make a new start
Cadd9
We`re not giving up
D(sus4)                  G      Cadd9   D
We`re not giving up this time


         G               
Come and raise your flags high let em fly high
     Em7 
It`s time to move on and break the new ground
Cadd9
We`re not standing still
D(sus4)                      G       Cadd9  D
We`re not standing still any more

         G               
Come and raise your flags high let em fly high
     Em7 
It`s time to let go leave the past behind
Cadd9
We`re not standing still
D(sus4)                      G       Cadd9  D
We`re not standing still any more
          
          Em7        Cadd9   G
There`s a cry that`s ringing out
        Em7       Cadd9      G
For the hearts that are open wide
Em7       Cadd9 G    Em7  Cadd9  G
Heaven is open wide, ooh

         G               
Come and raise your flags high let em fly high
     Em7 
It`s time to move on and break the new ground
Cadd9
We`re not standing still
D(sus4)                      G       Cadd9  D
We`re not standing still any more

         G               
Come and raise your flags high let em fly high
     Em7 
It`s time to let go and leave the past behind
Cadd9
We`re not standing still
D(sus4)                      G       
We`re not standing still any more