The song is very simple If you start with Bm as key tonality:

It is not always clear whether a song is in major or in its relative minor key and which is the tonic.

I haven’t listened to this song yet but havin a look at the chords and lyrics it becomes obvious:

https://tabs.ultimate-guitar.com/tab/james-blunt/ill-take-everything-chords-583215

Intro:

i III VI V

The song is very simple If you start with Bm as key tonality:

It is not always clear whether a song is in major or in its relative minor key and which is the tonic.

I haven’t listened to this song yet but havin a look at the chords and lyrics it becomes obvious:

https://tabs.ultimate-guitar.com/tab/james-blunt/ill-take-everything-chords-583215

(Notice this sheet is in a - minor!)

Intro:

i III VI V

It seems as if you understand enough of basic chord theory to finish now the adjustment in your analysis.

The song is very simple If you start with Bm as key tonality:

It is not always clear whether a song is in major or in its relative minor key and which is the tonic.

I haven’t listened to this song yet but havin a look at the chords and lyrics it becomes obvious:

https://tabs.ultimate-guitar.com/tab/james-blunt/ill-take-everything-chords-583215

The song is very simple If you start with Bm as key tonality:

Intro:

i III VI V

The song is very simple If you start with Bm as key tonality:

It is not always clear whether a song is in major or in its relative minor key and which is the tonic.

I haven’t listened to this song yet but havin a look at the chords and lyrics it becomes obvious:

https://tabs.ultimate-guitar.com/tab/james-blunt/ill-take-everything-chords-583215

Intro:

i III VI V