Has new crisis advice led to stockpiling essentials?

Major retailers tell Newsnight they've seen a surge in sales for essentials like tinned goods after a government call to stock up in case of a crisis. An independent online store also tells us demand has been unprecedented. Has the government messaging worked, and what is it we're preparing for? With Victoria Derbyshire. #politics #ukpolitics #preparedness #newsnight Newsnight is the BBC's flagship news and current affairs TV programme - with analysis, debate, exclusives, and robust interviews.