Zac Goldsmith has announced his resignation as Conservative MP for Richmond Park and Kingston over the Heathrow expansion announcement, according to reports.
The government has given the go ahead for a third runway to be built at the airport, a plan Goldsmith has always strongly opposed.
Ministers favoured the decision to expand Heathrow rather than Gatwick. Theresa May has also given her ministers the right to oppose the decision.
He tendered his resignation to Richmond Park Conservative Association, according to The Telegraph.
Other news reporters from other outlets have also tweeted an image of the resignation letter.