This is the chord progression of 42 by Mumford & Sons on Piano, Ukulele, Guitar and Keyboard.

[Verse]
Dm                 C                                 F                      Bb
Where do I turn to when there\’s no choice to make?
Dm                 C                                 F                                 Bb
And how do I presume when there\’s so much at stake?
Dm       C          F     Bb
I was so sure of it all

[Chorus]
F             Bb                         Dm                         F
But what if I need you in my darkest hour?
F             Bb             Dm                         F
And what if it turns out there is no other?
F
If this is our last hope
F
We would see a sign, oh
F
We would see a sign

[Verse]
Dm                         C             F                         Bb
Well I\’ve been running from the ashes we left
Dm                         C                         F
Forgiveness speaks for itself but how can I forget
Gm             F             Bb
When there\’s a stain on it all

[Chorus]
F             Bb                         Dm                         F
But what if I need you in my darkest hour?
F                         Bb             Dm             F
What if it turns out there is no other?
Bb             C
We had it all
Bb                                     F
If this is our time now
F
We wanna see a sign, oh

[Bridge]
Bb                         F
We would see a sign
Bb                         F
So give us a sign
Bb                       F
I need some guiding light
Bb             F             Am
Children of darkness, oh

[Outro]
Bb F Bb F Am
Oh-oh, oh-oh-oh
Bb F Bb F Am
Oh-oh, oh-oh-oh
Bb F Bb F Am
Oh-oh, oh-oh-oh
Bb F Bb F Am Bb F
Oh-oh