James Frith says patients may be less willing to share data as new figures show a rise in opt-outs

Concern is being raised about Palantir’s work with the NHS as new figures showed tens of thousands of patients have withdrawn their data from use in research projects.

James Frith, the health innovation minister, said he was worried about “mistrust” of the US defence and health tech company and “the impact it could have on people’s willingness to share data with the NHS”.

Relocation coincides with proposed laws that opponents say would entrench power of US tech billionaires in country

Dozens of protesters converged on Peter Thiel’s mansion in Buenos Aires this week after a congressional session raised questions about the billionaire’s presence in the country.

In white masks, they held signs saying “Peter Thief” and “No to the Peter Thiel law” in front of the wrought-iron gates of the $12m (£8.9m) residence, which Thiel bought in April as he moved his family to Argentina.