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"The Beyhive sale had a lot of panic buying and/or increased dynamic prices from Ticketmaster/SeatGeek - I think both," she says.

“And with eggs making national headlines daily, there may also be an element of panic buying, further fueling demand.”

It is understood that Diageo is managing its allocation limits on Guinness on a weekly basis and trying to avoid panic buying before the festive period.

Some landlords say that pubs have been "panic buying" Guinness.

Then this spring and early summer, shortages of petrol led to queues outside petrol stations, and the state-owned Nigerian National Petroleum Company warned against people panic buying.