The band is playing the song in "A" but I'll give you the Key of G chords and you can capo at the 2nd fret or wherever to match your vocal range.

First a verse....
          C G       D       G
Do you remember, the fiddlers playing
      D       C G         C          D
The songs and stories, the whole night long
            C    Em       D          G      Em
Tis little then that, you thought of leaving
             C                G       D
It seems so strange now, that you are gone

Now the chorus....
            C   G               C   G
Oh can you hear me, oh can you hear me
       C    G    D Em      C       D
AS you roam through lonely    London town
                C G             D       B7 Em
When evenings falling    You'll hear me calling
         C    G Am7         D      G
Come on home now    to the County Down


That's what I hear - ENJOY this beautiful song