No need to worry. Carry on regardless because that's what you will probably do anyway. This is just some parts of your government showing a rare case of realism and planning for an uncertain future. And it ain't looking pretty.
They're talking about 2040. But maybe they really mean 2020. Don't want to worry people too much. And although the paper is from the MOD, the analysis is from a Guardian Doomsayer.
http://www.nafeezahmed.com/2013/06/shock-uk-ministry-of-defence-report.html#more
Energy, environmental crises, imminent peak oil, food, water shortages, and sustained recession through to 2040 will create internal unrest. Says UK MOD.
https://plus.google.com/u/0/111663162843880007823/posts/cuUfGqL9Jyb
cheers Gray