London Mayor Sadiq Khan blocked a £50 million [1] contract between the Metropolitan Police and the AI firm Palantir.

The decision marks a significant intervention in the deployment of predictive policing and data analysis tools within the United Kingdom. It highlights the tension between the drive for technological modernization in law enforcement and the legal requirements of public procurement.

Khan cited several reasons for stopping the deal with the U.S.-based data firm. He pointed to concerns regarding national security and sovereignty, as well as a failure to meet surveillance standards. The mayor said that the process used to award the contract did not follow required guidelines.

"This is a clear and serious breach of procurement rules," Khan said.

The Metropolitan Police sought to utilize Palantir's software to enhance its data capabilities. However, the mayor's office determined that the agreement violated specific standards governing how data is handled, and how contracts are sourced for public services.

The blocked deal comes as cities worldwide grapple with the ethics of AI in policing. Critics of Palantir have frequently raised issues regarding transparency and the potential for algorithmic bias in surveillance. By stopping the £50 million [1] agreement, the mayor's office has signaled a stricter approach to the oversight of foreign technology providers in critical infrastructure.

"This is a clear and serious breach of procurement rules."

This action reflects a growing regulatory scrutiny of 'black box' AI systems in public safety. By citing sovereignty and procurement breaches, the London Mayor's office is asserting that the legal integrity of the bidding process and the protection of national data are more critical than the immediate operational gains promised by high-cost AI integrations.