Over the last few days, Downing Street has been quietly distancing itself from Nadhim Zahawi, though seems unwilling to do anything until the investigation into Zahawi's tax affairs finishes. Today, the Tory chairman's plight was made worse by comments from Jim Harra, chief executive of HMRC. Is the government preparing for the inevitable? Cindy Yu discusses with Katy Balls and Isabel Hardman.

Produced by Cindy Yu.