She tweeted: “Noooooooooo! Norman this cannot be true. I am so sad about this.
“You are immense, wise, clever and funny. I have LOVED working with you. Thank you for being a magnificent and kind colleague.”(sic)
Norman became a parliamentary correspondent in 1993 and has reported for the BBC from the Palace of Westminster since 1999.
In July 2011, he became the Chief Political Correspondent for the BBC News channel before being promoted to his current position of Assistant Political Editor in 2014.