Sales of essential items have jumped since the government launched its "Be Ready" campaign just under a month ago.
The campaign, launched on October 22, encouraged Britons to ensure they have three days' worth of key supplies in the event of severe weather, cyber attacks and other unforeseen emergencies.
A list of essentials, including bottled water, non-perishable food, cash and documents has been drawn up by the government, with Defence Secretary Wes Streeting urging people to be "alert but not alarmed".
