50 paracetamol per adult, 25 per child

A twenty litre container of clean water for every household member 

A course of ten Tamiflu for every household member

Four litres of bleach

Fifty surgical masks for every household member

15 cans of savoury food for every household member

A barbeque with a full tank of gas

An Eton FR400 handcrank radio/torch/siren and phone charger (no batteries needed!)

Laptop with broadband

DVDs of all three series of the 1970s BBC TV drama "Survivors" in which 99% of the world's  population is wiped out by an infectious disease