Liz Truss had her phone hacked by Kremlin spies while she was working as foreign secretary, according to a report.
The former prime minister’s personal messages with former chancellor Kwasi Kwarteng were raided, as well as sensitive details of international negotiations, it is claimed.
Security services discovered the major security breach during the summer Tory leadership election, according to the Mail on Sunday.
One unnamed source claimed to the paper that the device was so compromised it is now in a secure government location for analysis.
Details of the breach were passed to then-PM Boris Johnson and cabinet secretary Simon Case, who moved to prevent details becoming public, the paper claims.