The newspaper, citing unnamed sources, stated Russian spies have been suspected of the hack.
It stated the hackers gained entry to delicate info, together with discussions concerning the Ukraine battle with international officers, in addition to non-public conversations between Truss and a political ally, former Treasury chief Kwasi Kwarteng.
A UK authorities spokesperson declined to touch upon safety preparations however stated it had “strong methods in place to guard towards cyber threats”, together with common safety briefings for ministers.
Opposition events demanded an impartial investigation into the hack, and into the leak of the knowledge to a newspaper.
“Was Liz Truss’s telephone hacked by Russia, was there a information blackout and if that’s the case why?” stated Liberal Democrat international affairs spokesperson Layla Moran.
“If it seems this info was withheld from the general public to guard Liz Truss’ management bid, that might be unforgivable.”
Labour Occasion law-and-order spokesperson Yvette Cooper stated “the story raises points round cybersecurity”.
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“It is why cybersecurity must be taken so critically by everybody throughout authorities, the position of hostile states,” she instructed Sky Information.
“But in addition the allegations about whether or not a cupboard minister has been utilizing a private telephone for severe authorities enterprise, and severe questions on why this info or this story has been leaked or briefed proper now.”