A Gulf War veteran working on a supermarket checkout has compared it to being in a 'warzone'.
The Brit likened his current 'fear of the unknown' to when he was deployed to Saudi Arabia back in 1991.
Harold claims shoppers even lick cash notes before handing them to staff, putting him and his fellow colleagues at risk of contracting Covid.
Union bosses are reporting some shoppers have thrown money at workers and threatened to cough on them, writes The Mirror.
Harold said: "The supermarket is like a warzone.
"There's always this fear on checkouts of what the next customer might bring.
"Most people apologise when I mention (about social distancing) and move back when asked.
"But there are those who aren't interested and insist the virus doesn't exist. They say it's all a lie."
Harold, a former medic, served in a field hospital in the Gulf War, said some customers have been abusive when asked to comply with the rules.
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He said: "I had a customer insist that the two-metre rule is actually a one-metre rule."
He claims the shopper then swore at him and told him to "check his facts or go home."
Customers have even licked their fingers before separating cash, he added.
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Colleagues have been forced to self-isolate, although he says he does not know of any staff members who tested positive.
He potentially serves 10 customers with asymptomatic Covid every shift, he told the BBC.
The veteran believes customers should be forced to wear badges if they are exempt from wearing a face mask.
Harold says this would prevent others from complaining about people coming in without coverings.
The Union of Shop Distributive & Allied Workers (USDAW) has been inundated with reports of shocking behaviour among customers in stores.
A spokesman told The Mirror that Harold was not alone in complaining about shoppers licking their fingers to count cash.
They added that shoppers have also put notes in their mouths while counting their coins, threatened to cough on employees, been abusive and thrown money at them.
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