Britain's Wendy Morton, the member of the government in charge of discipline among Conservative Party lawmakers, resigned on Tuesday following the appointment of Rishi Sunak as prime minister. 

Morton said on Twitter she was "heading to the back benches", meaning she would be leaving the government.

Earlier, British justice secretary Brandon Lewis also resigned. "The new PM will have my support from the back benches to tackle the many challenges we face - as a party and as a country," Lewis said on Twitter. 

Meanwhile, Sunak's office has confirmed that Jeremy Hunt to remain in his post as finance minister.