… remedy for Irish “backstop” When he spoke in front of 10 Downing Street for the first time as prime minister on … before Dec. 31, 2020 or, with an extension, Dec. 31, 2021 or Dec. 31, 2022] as part of the future relationship. … withdrawal agreement might enable Johnson to remain in 10 Downing St. until the next scheduled election in 2022, and …