In December 2020 it was announced that at the beginning of 2021 Slack would succeed Lee Cain as the Downing Street director of communications, it was subsequently announced on 9 February 2021 that Max Blain had been appointed as the prime minister's official spokesperson and would start in the post in April 2021.
In December 2020, Slack was selected to take over Lee Cain's position as Downing Street's director of communications.  Max Blain was subsequently appointed as the Prime Minister's official spokesperson and will begin his role in April 2021.