This is an acoustic version of the song and my first attempt at writing a tab. I play it 
a bit slower than the original with a capo on the 2nd fret. Enjoy!
Chris Parker from Queensbury Bradford

Chords

Am    002210
G (320003@1)   320033
G5    300033
C (x32010@1)   032010
C/E   032013
Em    022000
G/F   200033
D (xx0232@1)   x00232
Dsus4 x00233
Dsus2 x00230

(verse 1)

Am (x02210@1)                     G (320003@1) G5 (355xxx@1)G (320003@1)G5There's (355xxx@1)things that I regret
Am (x02210@1)                                  C (x32010@1)                          G (320003@1)G5 (355xxx@1)GLike (320003@1)being called a nervous wreck and working up another sweat for you
Am (x02210@1)                  G (320003@1)G5 (355xxx@1)G (320003@1)G5There's (355xxx@1)nothing I can do
Am (x02210@1)                                      CFor (x32010@1)counterparts and bleeding hearts and all the things that fall apart for
G  G5 G
you

(bridge)

Em (022000@1)    C (x32010@1)             G (320003@1)  G/F (120003@1)G (320003@1)
G/F  Em
I don't keep my secrets there
  C (x32010@1)            D (xx0232@1)Dsus4 (xx0233@1)D (xx0232@1)Dsus2I (xx0230@1)hide them everywhere

(chorus)

G (320003@1)       D (xx0232@1)          Em (022000@1)      CI (x32010@1)could deny, but i'll never realise
         G (320003@1)              D (xx0232@1)       C (x32010@1)C/E (x3111x@5)
C  C/E
I'm just chasing rainbows, All the time

(verse2)

Am (x02210@1)                 G (320003@1)G5 (355xxx@1)G (320003@1)G5And (355xxx@1)then I missed my cue
Am (x02210@1)                      C (x32010@1)                              G (320003@1)G5 (355xxx@1)G (320003@1)G5Everybody (355xxx@1)had a laugh and then went for an early bath, did you?

(bridge)

Em (022000@1)    C (x32010@1)             G (320003@1)  G/F (120003@1)G (320003@1)
G/F  Em
I don't keep my secrets there, no no no
  C (x32010@1)            D (xx0232@1)Dsus4 (xx0233@1)D (xx0232@1)Dsus2I (xx0230@1)hide them everywhere

(chorus)

G (320003@1)       D (xx0232@1)          Em (022000@1)     CI (x32010@1)could deny, but i'll never realise
         G (320003@1)               D (xx0232@1)     C (x32010@1) C/E (x3111x@5)
C  C/E
I'm just chasing rainbows, All the time
        G (320003@1)           D (xx0232@1)            Em (022000@1)     CI (x32010@1)could deny (I could deny) but i'll never realise
          G (320003@1)               D (xx0232@1)    C (x32010@1)  C/E (x3111x@5)
C  C/E
I've been chasing rainbows, All my life

(instrumental)

Em G D C
Em G D C
Em G D C
Em G C D Dsus4 D Dsus2

(chorus)

G (320003@1)       D (xx0232@1)          Em (022000@1)     CI (x32010@1)could deny, but i'll never realise
          G (320003@1)              D (xx0232@1)     C (x32010@1)C/E (x3111x@5)
C  C/E
I've been chasing rainbows, All the time
          G (320003@1)         D (xx0232@1)            Em (022000@1)     CI (x32010@1)could deny (I could deny) but i'll never realise
          G (320003@1)               D (xx0232@1)    C (x32010@1)C/E (x3111x@5)
C  C/E
I've been chasing rainbows, All my life
          G (320003@1)   D (xx0232@1)  Em (022000@1) CI (x32010@1)could deny
          G (320003@1)   D (xx0232@1)  C (x32010@1)C/E (x3111x@5)C (x32010@1)
C/E  G
I could deny