Same old chicanery
Late last year, in a weak moment I signed up for allowing my data to be used for NHS research projects because it seemed like A Good Thing To Do. This was after ferreting round the available online information because I wanted to know about the currently running research projects and see what new problems & diseases the combined data of us all could fix. All looked good, though I was a little surprised that there were apparently no current research projects running and there was no information at all about the Federated Database - but at least Palantir seemed not to be involved.
Then two days later I saw a note saying that the new all singing, all dancing NHS Federated Database was just the Palantir-provided COVID tracking database with a new coat of paint.
So, remembering all the dodgy things that outfit has done, i.e. the BREXIT shenanigans, it was the work of a moment to cancel my link to the NHS Federated Whatsit, though I do wonder if they kept their word about not using my data: the NHS blurb said that they would only use data about signed-up citizens and would delete data about anybody leaving the project.