Debt free or away from densly populated areas when SHTF?

[Sardo_Numpsa]

I have read when the you know what hits the fan it's important to not to have any debt, and also not to be in a densly populated urban area.

I wanted to get an idea of which you guys think is more important?

The reason is ask is as follows. I have a house in zone 5 West London which I could comfortably pay off in ten years. That was always my plan, although after the riots in London in 2011 I started to think about moving further out.

My wife has now come around to the idea, although her reasons for moving are to get a bigger house in a nicer neighbourhood (Surrey way), which is going to add to the mortgage. Best of both worlds would be move further out, and buy cheaper....unfortunately not an option.

The risks I am thinking about are economic decline, economic depression and resulting social disorder. Move out of London avoid the riots, but then the risk is as the economy is up the creek and am out of work, can't pay my mortgage and bank take my house.

What do you think?