Devon and Cornwall will be inundated with refugees? Ifs, maybes, and conjecture

[Timelord]

It could be millions and millions of people, not just a few families in cars. More like waves of stampeding animals with an appetite of locusts. Even if a hundred thousand die on the road it will not stop the exodus if the scenario dictates it. What use your hay bales then or your few days foot travel from major urban centres? This is a small tightly packed country and that could be a problem for many areas depending on the scenario.