OK I'm probably sticking my neck out here and it really does not affect me because I do not live in the UK BUT didn't a majority of people vote to leave the EU even though there was no plan put in place and hence presented before they voted? To me that indicates a majority of people wanted to leave. It seems, from afar, that many people were sure the vote would be to stay and so did not bother to vote. We have compulsory voting in Australia so this is a little bewildering for me, however had those people voted the outcome may have been different but surely one cannot complain about the result when they could not be bothered to participate and the result goes against what they would have preferred. This may be simplistic but I cannot see why something as important as this would not have been dealt with by setting up a group that represented all political parties and maybe others to come to a viable agreement.
No doubt whatever happens there will be some unsettled times ahead for the UK but probably no more so than when the UK joined the EU.
Whatever happens now I'm sure the UK will manage to keep supplies of food etc available, not everything comes from the EU countries. The old adage what does not kill you makes you stronger may be the outcome here and I cannot see the rest of the world deserting the UK.