You can play this song in standard: EADGBE or in this alt tuning
 DADGAD
I will name the chord for standard and tab for the alternative.

Intro: Bm D
       Bm D A/C#*(short duration)

Verse: Bm     D

Pre chorus: G A Bm A

Chorus: Bm D G A x2
        Bm A G A
        Bm A G

Verse 2: Bm D

Pre chorus: G A Bm A

Chorus: Bm D G A x2
        Bm A G A
        Bm A G

Bridge: Bm A G
        Bm A D G
        Bm A G
        D   F#m

Chorus: Bm D G A (single strum)
        Bm D G A (regular strum)
        Bm A G A
        Bm A G

Outro: Bm D G A x2
       Bm


Alternative tuning chords:

Bm      D    A*   A    G    F#m
D--0----0----0----0----0----0-|
A--0----0----0----0----0----0-|
G--4----7----7----2----7---(7)|
D--4----7----7----2----7----7-|
A--2----5----4----0----5----4-|
D----------------------5----4-|