"This is a difficult day, but I leave this job honored to have been prime minister of the best country in the world," Sunak said in his farewell address.
Keir Starmer takes power as P.M. as U.K. Labor party sweeps to power in historic election win
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The historic defeat - the smallest number of seats in the party's two-century history - leaves it depleted and in disarray and will spark an immediate contest to replace Sunak, who said he would step down as leader.
Starmer vows 'government of service' for national renewal as he takes power after Labor landslide
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