The sale of NHS data to a US tech firm, Palantir, has raised concerns about privacy and the potential misuse of personal information. The head of Palantir, Alex Karp, has stated that his company would not have access to the data and that any decision to sell it would be made by the UK government. However, critics argue that the government should not be selling private data without consent, and that safeguards need to be put in place to protect patient privacy. The issue of data security and privacy will be a key focus at an upcoming AI summit in the UK.