Keepable foods - what and where to find them?

[Pannonian]

I'm looking for foods that are storable for considerable periods, ie. months at least when kept dry. A couple of things I've heard about are erbswurst and tushonka. However, local stores don't stock them. So I'd like to ask: can anyone suggest some reasonably interesting (for the British palate) foods that are thus keepable, and where one might find them? They need to be reasonable economical, so no extravagances, and they need to be found in shops in the London area.

[Fragony]

Rice of course. Also works great when you forgot yo take out your cellphone (or any electrical device) before washing your pants, just throw it in a cup with some rice and it will work just fine the next day. And pasta naturally, full of the good stuff and very cheap, olive oil + pasta + garlic + some parmasan cheese = a really really good meal. If you want meat buy liver, not very keepable but cheap as can be, very nuitricious and very tasty if you know what you are doing. Knowing what you are doing means adding sour apples.

[Hax]

I'm looking for foods that are storable for considerable periods, ie. months at least when kept dry.

McDonald's.

[Veho Nex]

MREs'

[Kagemusha]

dried meat. preserves for long and has high nutritional value. Are you going trekking? If so i have just the thing for you in mind.

[Pannonian]

dried meat. preserves for long and has high nutritional value. Are you going trekking? If so i have just the thing for you in mind.

No, just going through a survivalist phase after various media scares about fuel shortages. Googled rations, and erbswurst and tushonka intrigued me as something that might supplement staples which I've never tried before. I can't find them in local stores though, hence I'm asking if anyone knows where one might find them in the London area, and what other stores might be a good mix of keepability, availability, economy, and palatability.