Yes, we do know what it is.
I looked on ISB and they start on 137,000. That's quite a nice figure to start with! Now i just need to be that person that is in the right place at the right time!!
Without a B.Ed, or BA without any educational fields... or experience... with just a pgce...
I could be wrong... but I doubt it
With a PGCE I'd hazard a guess that you'd walk into the 70K positions without any trouble, and maybe get lucky with 80-90K.
Sorry to burst your bubble a bit, but simply having a PGCE isn't gonna get you hired (at 137K) when the other applicants have BA's or MA's of Ed.
Which they will, with a few years experience to boot.