> very much illegal analysis on air-gapped national security systems

They're hosted by the US. It would be illegal for them not to comply with orders to hand data over to US security services. This has been a concern since the Microsoft "safe harbour" GDPR case. It's now the same thing with much higher stakes.

Since this: https://www.theguardian.com/law/2026/feb/18/international-cr... , no US tech company can give a meaningful guarantee that they won't just turn off critical UK defence systems if ordered to by Trump. Such as if we tried to carry out actions against the invasion of Greenland. I admit that was a couple of months ago, so it now seems like ancient history, but the US picks a new invasion target every month.

They are _not_ hosting UK government data in the US. They offer on-premise and self-managed cloud offerings, which are often used where data sovereignty is important. Additionally, customers often manage access control - including for Palantir employees - themselves, so it would not be a simple "pull the power plug" if the US/UK relationship went awry.