Sub Focus - Could This Be Real Chords & Tabs

Played on piano as per the song. I've given some bass notes with the chord list below, 
these with the chords to make it sound like the original song (for the first two, just 
the root note of the chord on bass).

Chords

Bbm
Gm7b5
F# (play Ab on the bass with this chord)
Bbm (play Eb on the bass with this chord)
Ab (play F on the bass with this chord)


Verse
[ Tab from: https://www.guitartabs.cc/tabs/s/sub_focus/could_this_be_real_crd.html ]
Bbm
   I've seen it all with in my dreams

Gm7b5
   I tried so hard so you'd believe

F#
   But now that I'm gone

    Bbm               Ab       Bbm
I'm feeling like this could be real

    Gm7b5                       F#
I'm feeling like this could be real

    Bbm               Ab        Bbm...
I'm feeling like this could be, Real Real Real Real...

In comes the dirty bass, the verse repeats again later.