Vapour lock, not Carb-ice.
I may have been concentrating too much on the waxing and ice effects of very low outside temps during cruise .
...We are advised the uplifted fuel (stored and delivered at subzero temp) exceeded specs by a long chalk . being non waxing at temps down to -57 instead of only the normally expected -47ish
...The Chinese gave us a blend specially suited to their expected ISA minus 20 or worse. Its like our road fuel we get a more volatile blend in the winter.
...But how was this blend achieved? Was it just a generally lighter distillate? or was it by adding a much more volatile "additive"? With motor fuel it might be "quickstart" or alcohol.
.. The uplift was mostly in the CTW tank with the Wing tanks topped off.Fuel management in flight used a large proportion of the uplift at first., the remainder mixing with and somewhat diluting the original wing tank fuel.
...Finally descending into warmer UK temps at LHR, did this volatile cause gassing, cavitation, and loss of fuel pump efficiency when an extra demand reduced manifold pressures on the suction side of the pumps?