Dominic Cummings, British Prime Minister Boris Johnson's most powerful adviser, will stop working for Downing Street in mid-December as Johnson tries to reset his premiership after a series of failures in tackling the coronavirus pandemic. Cummings, expected to stay until around Christmas, was pictured by a Reuters photographer clutching a box as he left Johnson's office in No. 10 Downing Street on Friday evening. The BBC, Sky News and other media outlets reported that Cummings had left his role for good, abruptly reducing the sway of Brexit hardliners in Johnson's government.