I probably should have said "Baltistan style" Phil, meaning that the BIR possibly came from chefs who brought their cooking knowledge and techniques from that region, as opposed to "The Balti" as we know it, or don't.
My investigation and research is very circular and sometimes wildly tangential at the moment and it is clear that there is no single explanation as to how either BIR or Balti evolved. I am, however, thoroughly enjoying the trip at this point.
Different singular and combined definitions of Balti so far:
A dish cooked in a Balti Pan.
A dish served in the same pan in which it was cooked, ie a Balti Pan, Karahi or Kadhai.
A dish that is dryer than a normal BIR curry with more meat and less sauce. (Contrary to what Jerry has recently posted.)
A dish that is eaten by using bread rather than utensils.
A dish that is an "Indian Stir Fry".
A dish that contains both meat and vegetables.
A dish that comes from Birmingham.
So does this mean that you can't have a Balti anywhere other than BRUM, in a normal pot, serve it on a plate, eat it with a knife and fork, have a saucy dish or a balti that contains only meat or vegetables at the exclusion of the other? Can a balti be slow cooked?