Britain's Leader of the House of Commons Jacob Rees-Mogg arrives to attend a cabinet meeting at 10 Downing Street in London, Britain, on Dec. 17, 2019. British Prime Minister Boris Johnson held the first cabinet meeting on Tuesday after winning last week's general election. (Photos: Ray Tang/Xinhua)

Britain's Secretary of State for Digital, Culture, Media and Sport Nicky Morgan leaves after attending a cabinet meeting at 10 Downing Street in London, Britain, on Dec. 17, 2019. British Prime Minister Boris Johnson held the first cabinet meeting on Tuesday after winning last week's general election.

Britain's Defense Secretary Ben Wallace leaves after attending a cabinet meeting at 10 Downing Street in London, Britain, on Dec. 17, 2019. British Prime Minister Boris Johnson held the first cabinet meeting on Tuesday after winning last week's general election.

British Foreign Secretary Dominic Raab arrives to attend a cabinet meeting at 10 Downing Street in London, Britain, on Dec. 17, 2019. British Prime Minister Boris Johnson held the first cabinet meeting on Tuesday after winning last week's general election.

Britain's International Trade Secretary Liz Truss leaves after attending a cabinet meeting at 10 Downing Street in London, Britain, on Dec. 17, 2019. British Prime Minister Boris Johnson held the first cabinet meeting on Tuesday after winning last week's general election.

Britain's Secretary of State for Health and Social Care Matt Hancock arrives to attend a cabinet meeting at 10 Downing Street in London, Britain, on Dec. 17, 2019. British Prime Minister Boris Johnson held the first cabinet meeting on Tuesday after winning last week's general election.

Britain's Secretary of State for Business, Energy and Industrial Strategy Andrea Leadsom leaves after attending a cabinet meeting at 10 Downing Street in London, Britain, on Dec. 17, 2019. British Prime Minister Boris Johnson held the first cabinet meeting on Tuesday after winning last week's general election.

Britain's Attorney General Geoffrey Cox leaves after attending a cabinet meeting at 10 Downing Street in London, Britain, on Dec. 17, 2019. British Prime Minister Boris Johnson held the first cabinet meeting on Tuesday after winning last week's general election.