LONDON — Britain’s government is facing intensifying pressure over the role played by U.S. tech company Palantir in key state services — with opponents spying a potential political win. Campaigners have protested Palantir’s involvement in the U.K. public sector before, largely due to its billionaire founder Peter Thiel and its work with U.S. immigration agency ICE. The data analytics firm’s British contracts include a £330 million deal to provide a data platform for the National Health Service