In the event of a large-scale national disaster much of our core infrastructure could be temporarily disrupted or broken.  The implications include:

• Food supply chain failure resulting in an inability to restock supermarket shelves and consequently widespread panic
• Electrical grid failure leading to no internet access, communication networks, household heating, lighting or ability to cook food
• Failure of banks and payment facilities resulting in an inability to purchase essential items including medicines, food and fuel

As such it would be wise to have the following items on hand:

1. Water - At least one gallon of water per person per day for drinking, cooking, and hygiene purposes.

2. Non-perishable food - Canned goods, dry goods, and other non-perishable foods that can provide sustenance without refrigeration.

3. Medications - Any necessary prescription medications, as well as over-the-counter pain relievers, fever reducers, and other basic medicines.

4. First aid kit - Bandages, gauze, antiseptic, and other basic medical supplies for treating minor injuries and illnesses.

5. Batteries - An ample supply of batteries for torches, radios, and other essential devices.

6. Torches and lanterns - Essential for providing light during power outages.

7. Portable stove and fuel - A portable stove, such as a camping stove, and a supply of fuel for cooking and heating water.

8. Matches and lighters - Essential for starting fires and lighting stoves.

9. Cash - A supply of cash in small denominations for purchasing necessary items in the event that electronic transactions are not possible.

10. Portable radio - A battery-powered or hand-crank radio for receiving news and emergency broadcasts.

11. Hand sanitizer - A supply of hand sanitizer for maintaining hygiene when water is not available.

12. Personal hygiene items - Toilet paper, soap, toothpaste, and other personal hygiene items.

13. Warm clothing and blankets - Essential for staying warm in cold weather.

14. Personal documents - Important documents such as passports, birth certificates, and insurance policies in a waterproof container.

15. Tools - Basic tools such as a hammer, nails, pliers, and a knife for repairs and small tasks.

It's important to note that this is not an exhaustive list and the specific items needed may vary depending on individual circumstances and location. Additionally, it's important to have a plan in place for how to safely store and access these items in the event of a disaster.