A Greek national traveled to Britain on behalf of a foreign intelligence service to conduct surveillance on a journalist critical of the Iranian regime, prosecutors alleged Friday when the man appeared in a London courtroom to face espionage charges.

UK prosecutors allege a Greek national traveled to Britain on behalf of a foreign intelligence service to conduct surveillance on a journalist critical of the Iranian regime.

London police said a Greek national was charged on Friday with assisting a foreign intelligence service, believed to be Iranian, in targeting a UK-based