Yeah good start and well done Toddie.
We buy value range stuff but you do have to like it, the soup/spices is a good idea for flavour as is a good stock of decent stock cubes, nothing wrong with oxo, but knorr and the organic ones are the main reason behind many of my cullinary sucesses.
I've been experimenting on the buy what you like to eat front and tinned stuff having an acceptable shelf life for the sort of bunkering down we can afford, Asda's chnky chicken in white sauce for 90p a tin mixed with 3 packs of Lidls dried savour rice chicked flavour, one decent stock cube, and some frozen shredded spinach cubes and fresh peppers is a preppie meal my lot now look forward too, so thats a result.
I've also tried last week a lunchtime one person thing trying to loose weight be healthy and minimise water use thing I'll share, Asda super noodles, Aldis plum tomatoes. spinnach, and holland and barrett's soya mince savoury version, with a little basil and smoked paprika tastes fine, to make it even more healthy I'd chuck some peppers in too. I'd call this a sucess too, trouble is it give me risky flatulence on a level which if I could learn to control could compete with the Tintagel town brass band
I'd stay away from the cheapest of long grain rice though that stuff uses more water and energy to get it cooked and it turns out very starchy, which you would have to put up with if water was short for rinsing.
Other threads talking of the legality/safety of storing highly quantities of highly flamable fuels also swing me toward tinned, most of which can be eaten cold, or warmed, rather than actually having to cook, so tinned spuds,speggy and , that packet microwave/warm in the pan rice will win out against water and fuel heavy rice and pasta, I have in mind using mess tins on hexamine cookers fueled with tea light candles, which can be stored much more safely and in large quantities (£2 for 100 at Asda/Tesco BTW)
I'm also looking at slow cooking, having realized that the electic beast does it on 60-150W of juice, figured a big saucepan propped over a couple of the bigger night light type version of tea lights would work well, then we are in to stew territory using the dried mixes, lentils, barley, etc and tinned tomatoes, cheap soups ( the thin weedy value range soups OTT in water working in our favour here)
Realizing I should put this lot in recipes I'll stop the ramble there, good work Toddie, basic food/water preps are one of the best starting points, then one thing leads to another, firstly if I am thinking water will be short, how do I keep clean, flush the toilet, oh need more TP, oh poo bags,

Carry on Prepping !

I have a strategy, it's not written in stone, nor can it be, this scenario has too many variables, everything about it depends on those variables, being specific is not possible.