Zac Goldsmith Heathow resignation is an attempt to restore his reputation, says Guardian journalist

Zac Goldsmith's resignation is all about restoring his reputation, according to The Guardian's London commentator. 

The government backed plans to build a new third runway at Heathrow yesterday, prompting Goldsmith to resign as a Conservative MP.

Dave Hill told Julia Hartley-Brewer that Goldsmith, who ran unsuccessfully for London mayor earlier this year, wanted to seem a man of principle after that defeat, which was accompanied by severe criticism.

Hill said: "There's a lot riding on this for him in terms of how he's seen by other people."

 Listen to the full interview to find out more