Key of E

4 - 4 - 6 - 1

Bridge is just 1 for a while and then 4 for a while. Good example of a riff that is E pentatonic but being played over A. Also known as playing a 1 chord on top of a 4 chord. 

Key of C

Main prog:
4 - 4 6 - 5 - 5 6

Great for a backing track. Also a good example of a vocal melody singing the 1 chord over the 4 chord.

Intro progression (1:13):
4 - 5 - 6 - 6
4 - 5 - 6 - 6
4 - 5 - 5of6 - 6
4of4 (Bbmaj7#4)

I love this song and love this band 

Key of D (song is out of tune)

Main part
5 - 4 - 4 - 4 (D, the root of the key, is played in the bass the whole time

Chorus
2 - 3 - 4 - 3
2 3 4 5

Other section (1:35)
4 - 1 5 (x3)

Great song, great band. The 1975 would not exist without this band. 

Key of Bb

First part of the song is written around the 6 chord:

First prog:
6 - 1 - 2 - 4

Second prog:
4 - 1 - 5 - 6 

However the big ending is 4 chord driven (3:30)
4 - 4 - 4 - 4
6 - 6 - 6 - (2 6 5 3)

Notice they start throwing in 2 (the 4 chord's relative minor) at 5:22

This song is incredible to play live