I wasn't aware of the numbers on the ETOPS certified 737; however I agree with BOAC. Surely common sense prevails should you reach something close to 1800kgs on a non-ETOPS rotation. The 'regular' QRH relates to 453kgs aside, which would have me flying around at final reserve on most of our OFPs. Even if we were operating ETOPS 737s, the figure set for the LOW FUEL indication would have us eating up our reserve allowance. This is defaulted to be no less than 2000kgs at the planning stage. Rectal contraction would ensure that the LOW FUEL NNC was well out of the way by this stage. Maybe that's just me?