Boris Johnson resigns: Chris Mason reveals news live on-airThis video can not be playedTo play this video you need to enable JavaScript in your browser.Boris Johnson resigns: Chris Mason reveals news live on-airCloseThe BBC's political editor, Chris Mason, breaks the news of the PM's departure live on-air.SubsectionUKPublished7 July 2022Shareclose panelShare pageCopy linkAbout sharingRead description