Hi from Derby in the Midlands.
Ladyluck, I've also considered the peak district as a place to go when the crap hits the fan. The problem is we don't really know what we're preparing for or how badly we'll be hit.
Of course, it may be nothing!

But just in case...
I read somewhere on the forum that the best thing to do is start by getting 1 day's worth of food and water stored. Then pat yourself on the back. Then get 3 days worth. Then pat yourself on the back. And so on. That sets you up if the best thing is to remain at home for a while.
If you need to relocate I reckon in the initial stages mobility will be the key. A small lightweight tent, 4-season sleeping bag, small cartridge based burner for hot drinks etc. Try to get everything you need into a format that you can carry reasonably comfortably.
Get water purification tablets so you don't have to carry water. Dried foods because they're lighter and a large supply of vitamin pills. Fire-making materials. Try not to rely on a car unless you have large stockpiles of fuel. A clockwork radio may also be extremely useful.
I also think we need to arrange rally points with people local to us. None of us know where we'll be if and when something does kick off, so having an immediate goal will be vital to help deal with the psychological impact.
I realise this is all short term stuff, largely because I don't have the resources (or knowledge of whats going to happen) to be able to prepare much further ahead.
Any thoughts?