Having never flown the distances it takes to go from Sea to London, except that long distance one to the great rice paddy many years ago, what diet changes maybe 3 days out should you go through to get yourself cleaned out and then get your strength up for the hours in the air?
Any special meal plans that all you FF use?
Should you even get that belly and digestive track of yours prepared for what appears to be drastic changes ahead and what is the best way to do it.