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

[Lightspeed]

Devonian,

Why do you thing a dirty bomb in London would not cause mass evacuation?

For sure the authorities would try to keep as many people in place as possible, but who's going to sit tight with invisible and lethal radioactive material in the nearby environment?

I think huge numbers of people would assert their independence of authority and get the hell as far away as possible.

Bomb in London. Prevailing wind generally from the West. So heading into the wind would be the logical safe direction to flee.