Rory Stewart, former Tory leadership frontrunner, said it was with “sadness” that he was announcing his resignation. He has stood as an MP for Penrith and the Border since 2010. He tweeted: “It’s been a great privilege to serve Penrith and The Border for the last ten years, so it is with sadness that I am announcing that I will be standing down at the next election, and that I have also resigned from the Conservative Party.”
He is a former international development secretary and prisons minister.
Mr Stewart has most recently clashed with Prime Minister Boris Johnson over his Brexit stance.
He is said to have been one of the Tory rebels plotting against Mr Johnson in a bid to force him out of No 10 as they continue to defy his Brexit plan.
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