Supermarkets are boosting security at their doors and have doubled the number of delivery slots amid fears Covid-19 panic buying could return.
Shelves have been stripped of essentials including toilet roll, flour and frozen items up and down the country, while online booking slots are quickly filling up.
Britain's biggest chains have made assurances that they have enough stock and delivery slots to last, but shoppers were shocked to find empty shelves at the weekend.
Fearing a new lockdown could see a return to panic buying scenes witnessed in March, one shopper declared: 'It's happening again.'
It comes as Morrisons announced it will be reinstating marshals at its doors to limit the number of shoppers coming in and out, while also reminding them to wear face masks.
There are concerns that a second wave of panic buying has already begun as shoppers share photographs of supermarkets with the shelves stripped bare (above, ASDA in London
One woman was seen picking up 80 toilet rolls at a Tesco in Kennington, South London, today
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Concerned shoppers took to Twitter over the weekend to share photographs of their local supermarkets, showing shelves completely emptied of essential items.
One Twitter user shared photographs of an ASDA in London where cereals seemed in short supply, leaving shoppers with fewer brands to choose from.
Another shopper posted pictures of a Tesco in the West Midlands, where kitchen roll and toilet roll was in short supply - but had not been completely cleared out.
One person shared pictures on Twitter, writing: 'This was my local Tesco! People are already panic buying once again! Even though supermarkets do stay open.'
An ASDA shopper said: 'This is our ASDA it's madness and as you say even though they are staying open.'
Shelves have started to empty at supermarkets today, including at Tesco Extra store in Bolton
Canned goods and other items were starting to disappear from the shelves at the Bolton store
Shoppers were also purchasing bags of pasta, amid warnings of panic buying in recent days
Tesco has boosted its online ordering capacity to around 1.5million, but in its stores the shelves were emptying quickly
And another person predicted that 'It's happening again'.
Tesco's weekly ordering capacity has risen from 600,000 to 1.5million - but it remains fully booked until Wednesday.
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Morrisons has reinstated marshals to monitor customer