Former London Mayor Boris Johnson has announced he will not run to be leader of the UK Conservative Party and Prime Minister.
Mr Johnson had been a front-runner for the post, having been a prominent figure in the campaign for Britain to leave the European Union.
But he's decided not to run after a former ally - Justice Minister Michael Gove - announced he would withdraw his support for Boris and stand himself.
UK correspondent Olly Barratt says it's a shock.
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