UK Ministry of Defence sources warn that Palantir's role in the UK government poses a national security threat, as the company can build a detailed picture of the British population and infer state secrets. The sources claim that Palantir's technology allows it to aggregate data from different government datasets, potentially giving it access to sensitive information. This has raised concerns about the company's influence and the potential risks to UK security. The UK government has contracts with Palantir worth hundreds of millions of pounds.