Tins of tuna and beans, eh Monica? Inexpensive carbs and protein - runners and weight trainers love baked beans as they can pack them in for a fast, unfussy re-fuel of glycogen depleted muscles. Likewise, tuna provides a cheap source of protein and if packed in brine is low in calories. However, the tinned version is also low in the elements that are better served by other canned fish - Mackeral is a far richer source of omega-three fats. The downside is that it's more calorie-dense (which in a survival situation wouldn't necessarily be a bad thing). A good compromise, in terms of nutrients v/ fat content v/cost, is tinned salmon.
Balanced against this is the impact on world fishing stocks and substances such as mercury. Pelagic fish like tuna are a resource to be managed better than they have been to date, and farming isn't necessarily the answer. There are a few boutique canneries (yes, there is such a thing) that aren't a bad option - more expensive, but better for you both in terms of taste and in quantities of unwanted substances. Of course, if the end of the world is nigh, even your bland off the shelf budget brand is something to be grateful for. Likewise beans and legumes are great...when not packaged with high levels of sodium! When you're getting in your survival rations, nab some kidney beans, lentils and chickpeas as well...a bit of variety doesn't go astray.
Given my druthers, I like my pelagic fish either seen from 30 meters down (a big tuna or trevally chased by a gray whaler off the Blue Corner in Palau is something to behold), or served up grilled with a not overly-strong sauce and a crisp sparkly...a wahoo steak preferably, but tuna will do in a pinch!
We didn't get doomsday scenario stockpiling advice here - we got snazzy fridge magnets that have coined the popular catchphrase used in mockery: 'Be alert, not alarmed!'
I'm rather surprised that 28 Days Later didn't make the list as it was compiled by the Brits - nasty, chilling movie that gets under your skin. Suppose it's got more of a horror element, though. I suspect you're right, Fi - 'Disastrous' rather than 'Disaster' seems to be the key note here.