We cannot prepare for a societal collapse of a magnitude the Red Shield family has portrayed in that image. Living under a hedge in a remote area of the Brecon Beacons would merely delay the inevitable for a little longer than most who will succumb.

Once a group of marauders kick one's front or back door in or a window it will be over. You may eliminate one or two if you have a sword or similar to defend with, but will soon be overwhelmed.

When there's no rule of law and all former constraints are abandoned during a kill or be killed battle to survive for another day then it will be a case of when and not if human predators pay a visit.

Once hunger takes affect former perfectly decent, amiable neighbours will become monsters.

To strike a somewhat brighter note, obesity rates will plummet.