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

[Devonian]

A couple of quotes from the Fact Sheet, Dirty Bombs are far more of a 'disrupting' measure than one which will harm and mame:

It is extremely unlikely that anyone who survives the explosion will become sick from radiation. In addition, your ability to have children will not be affected.

The radioactive particles that are scattered as a result of the explosion cause the "dirty" part. The explosives in such a bomb would still be more dangerous than the radioactive material.

The effects of an RDD can vary depending on what type of radioactive material is used and how much material is scattered. It is very difficult to design an RDD that would deliver radiation doses high enough to cause immediate health effects or fatalities in a large number of people. For the most part, an RDD would most likely be used to:

•contaminate facilities or places where people live and work, disrupting lives and livelihoods,
•cause anxiety in those who think they are being, or have been, exposed to radiation.