Mr. Johnson, who will be the 14th British prime minister to serve during the queen’s reign, is expected to make his first speech outside 10 Downing Street before entering the residence for the first time. He is also expected to begin announcing members of his cabinet.
Dominic Cummings, a director of the “Vote Leave” campaign ahead of the 2016 referendum on Britain’s withdrawal from the European Union, is expected to become a senior adviser to Mr. Johnson, according to the BBC.
While his appointment would be likely to be applauded by hard-line supporters of Brexit, his role in that campaign’s ruthlessly successful strategy has made him a controversial and sometimes mythologized figure.
[Read more on Boris Johnson’s chaotic personal life.]
A handful of Conservatives who served in the previous government have resigned already, signaling they had no intention of serving under Mr. Johnson’s leadership.
Alan Duncan, the second-ranking official in the foreign office, resigned on Monday, while Anne Milton, an education minister, announced her resignation on Tuesday shortly before Mr. Johnson’s victory in the party leadership race was announced. Philip Hammond, the chancellor of the Exchequer, resigned on Thursday.
Other prominent figures, including David Gauke, the justice secretary, and Rory Stewart, the international development secretary, have said that they would not serve in a government led by Mr. Johnson because of concerns about his willingness to leave the European Union without a deal.
Boris Johnson on Verge of Taking Over in U.K. – The New York Times