A woman casually walks into a convenience store and starts filling a bread crate with goods from one of the aisles.

A shop assistant tries to stop her, but she shrugs him off, undeterred. With the crate now full of items, she leaves without paying.

It is a scenario that is played out day in and day out across Britain, as retailers warn the surge in shoplifting is now “out of control”.

I’m sitting in the security office of a busy city centre shop and I’m watching as a schoolboy walks in and helps himself to a sandwich, stuffing it into his jacket.

Watching with me is shop worker Anton Mavroianu who positions himself by the main entrance waiting for the youngster to leave.

When the boy does leave, Anton demands the item back. Instead of being frozen with fear that he’s been caught, the boy laughs and walks off.

“All we can do is try to stop them,” Anton tells me. “But this is just another day for us.”

A few weeks earlier, when Anton tried to stop a shoplifter who had stolen from the store, the man pulled out a knife and tried to attack him.

This terrifying incident is an example of the very real threat posed to shop workers as they try to stem the tide of brazen thefts.

Shoplifting offences recorded by police in England and Wales have risen to the highest level in 20 years.

The British Retail Consortium (BRC) also reports that theft-related losses cost the retail sector millions each year, adding strain to an industry already grappling with post-pandemic recovery and economic uncertainty.

For small businesses, which lack the resources of larger chains, persistent theft can threaten their very survival.

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Ricky Dougall owns a chain of convenience stores and says shoplifting cost his business around £100,000 last year.

“Shoplifting is a huge problem and it is what stops us from growing the business.

“People come in and help themselves like they own the place and when you call the police, most of the time, they don’t turn up.”

Mr Dougall says part of the problem is how this type of crime is classified.

Sentencing guidelines for thefts of under £200, so-called “low level shoplifting”, were relaxed in 2016. That is being blamed for the surge in cases.

An exclusive Sky News and Association of Convenience Stores survey shows that 80% of shopkeepers reported a retail crime within a week in October.

The poll also found 94% of shopkeepers say that in their experience, shoplifting has got worse over the last year, with 83% not confident that the police will take action against the perpetrators of retail crime on their premises.

Paul Cheema from the Association of Convenience Stores says retailers are looking to government to support them.

“I would say officials do not give a s*** about us retailers,” he tells me. “The losses are too big and I don’t think we can sustain that anymore.

“I would urge Keir Starmer to come and meet us and see up close the challenges that we are facing.”

Retailers have responded by investing heavily in security measures, from advanced surveillance systems to hiring more security staff.

But these investments come at a cost, often passed down to consumers through higher prices.

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I get chatting to Matt Roberts, head of retail in the store I am in. He worries about shoplifting, but he worries about the staff more.

He says: “I would imagine they dread coming to work because they’re always on tenterhooks wondering whether something is going to happen today, whether they are going to have to try and confront someone.

“It’s a horrible feeling. It’s out of control and we need help.”

The government has acknowledged the urgency of the issue. Home secretary-led discussions with retail associations and law enforcement are under way to craft a comprehensive strategy.

In the King’s Speech, the government outlined details of a Crime and Policing Bill, which promised to “introduce stronger measures to tackle low level shoplifting”, as well as introducing a separate offence for assaulting a shop worker.