Rishi Sunak faced double by-election defeat in safe Tory seats, with Labour and Lib Dems overturning majorities of about 20,000.
Labour won Selby & Ainsty, while Lib Dems took Somerton & Frome, making Tory MPs concerned about their own majorities.
Yet, Sunak avoided being the first PM since 1968 to lose three by-elections, as Labour couldn't secure victory in Boris Johnson's former seat of Uxbridge & South Ruislip.
Report by Covellm.
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