Not food security in the big picture sense, but I think it is important to do as much as possible for food security at a personal level. I do try to have some stocks of dry stores that can last, and rotate through those, to have a buffer. I’m currently getting rid of (mostly by eating) things the family had previously bought and not liked, but then I want to restock properly with a general buffer of about 2-3 month’s worth of basics (pasta, rice, tins that I use, etc) and some emergency items that I rarely but will use (Knorr pastarias, smash type dried mash potato mix, dried milk powder etc).
i would love to grow more than I do - but I only have a balcony now. But I still had salads and spinach, spring onions, radishes, tomatoes, courgettes, chilli’s and peppers, peas, and beans (broad, french, boots) last year. And herbs.
I had rhubarb in the garden at home. And in a previous Garden and on the allotment I had for a good few years, I had cherries and various currants, raspberries, strawberries etc. I would also love to grow more trees, especially nuts (hazel and walnuts) and fruit (apples, pears, plums). They take a while to get going but are worth it once they get settled in properly.
my MIL kept chickens for years, and the eggs were great to have. And my DB used to go fishing at home growing up, and I could comb the shores for shellfish. And I have made lots of jam, chutney and frozen plenty in my time to preserve for later, and I find oven-drying tomatoes and storing in oil works well. But they are skills people don’t seem to use much anymore.
as I am normally quite urban (and currently completely!), it’s a dream to get back to it someday, but I am looking for somewhere with good potential that we could slide into retirement and start putting some of the key bits in now like trees, fruit bushes and a glasshouse/plastic tunnel to extend growing seasons. And making raised beds for easier gardening in older age. It just needs a decently large garden (1/3 of an acre would be loads).