I dont think you can compare leeds PIA service with that of bhx since the BHX operation is twice the size and uses larger aircraft. Birmingham has one of the largest pakistani communities in europe and has a larger population than manchester and Leeds.. So I dont think PIA will be in a hurry to drope the route ,not saying that it could not happen.From what i understand bhk-ISB atracts 7000-9000 monthly and has almost the same amount of flights than the Man operation.There has being no official word from PIA about this deal with turkish airlines on its webside. It just media speculation. Time will tell!