“One guy… didn’t like his intro,” Jack responded. “And then, during the show, when I was up on stage hosting, one of the producers found him by the autocue, with his publicist, changing my script – actually deleting the intro and typing in his own one.”
Article source: https://www.huffingtonpost.co.uk/entry/jack-whitehall-upset-jared-leto-brit-awards-introduction_uk_699d804ee4b074e2825bca44