Deputy Commissioner Matt Jukes said about 100 prolific shoplifters were responsible for 4,000 offences across London, and the force was "going up the food chain" to target the businesses and criminals profiting from theft.
BBC London accompanied officers during a raid on a phone shop in Electric Avenue, Brixton, where three men were arrested on suspicion of handling stolen goods. Police said the raid followed months of investigation after reports that stolen phones were being brought to the shop and sold on. Officers checked mobiles on display against police records and within minutes identified several stolen phones. Insp Tom Martis-Jones said it was "not proportionate" to go through every device at the roadside, so officers seized them all to check back at the station.
The Brixton raid was one of dozens carried out across London. In Hounslow, officers seized five pallets of suspected stolen tools and counterfeit Dyson products. Suspected stolen food was found in shops in Lewisham, Clapham and Southall, while searches also uncovered cash, drugs, weapons and suspected stolen identity documents.
The Met said it had issued warning notices to car boot sale organisers for the first time, making clear they could face criminal liability if they knowingly facilitate or ignore the sale of stolen, counterfeit or illicit goods.
Jukes said businesses were suffering from thefts, and that some shops themselves were receiving stolen goods and selling them on. "It's affecting shopkeepers, it's affecting quality of life," he said. "Who wants to go into a shop and see someone clearing the shelves when you're under pressure yourself to spend your own money? It matters to businesses, it matters to people's sense of safety in London."
The force is working with retailers to mark commonly targeted products with SelectaDNA, a forensic marking solution that leaves a traceable code visible under UV light. "It's like chemical DNA that we can identify," Jukes said. "We can track back to the place that property was stolen, which means we can actually start to shut down those businesses that are receiving stolen goods to sell them on."
Police said the operation was not aimed at small businesses, but at those selling stolen goods and undercutting legitimate retailers. "People do know about that vape shop that no one ever goes into, that phone shop that doesn't look quite right, or that convenience store that's got too-good-to-be-true prices," Jukes said.