The Guardian produced this many months ago! Recommended 72-Hour Survival Checklist • Bottled Water: At least nine litres of water per person (roughly three litres per day for drinking, with extra recommended for cooking and washing). • Non-Perishable Food: Tinned meat, fish, or vegetables, as well as dried fruit and nuts that do not require heating or boiling water. • Battery-Powered or Wind-Up FM Radio: To receive emergency broadcasts and updates. • Torch and Extra Batteries: For lighting if power fails. • Charged Power Bank: To keep mobile devices and communication tools charged. • First Aid Kit: Including waterproof plasters, bandages, antiseptic, a thermometer, and regular personal medications. • Sanitisation Supplies: Hand sanitiser and wet wipes. • Warmth and Shelter: Blankets and extra warm clothing. • Cash: Physical money in case electronic payment systems or card networks collapse. • Important Documents: Printed copies of passports, birth certificates, insurance policies, and emergency contact or medical instructions. Baby and Pet Supplies: Dedicated food, water, and care items if you have infants or pets in the household.

I don't know anyone who has said that they expect war explicitly start in 2029. That seems sort of arbitrary really, conflict in Ukraine is going badly now I can't see why it would be different in three years.