LONDON (AP) – Prime Minister Boris Johnson has left his Downing Street office for the last time as he heads to Scotland to formally offer his resignation to Queen Elizabeth II. The British leader, who announced his intention to step down two months ago, is expected to meet with the queen late Tuesday morning at her Balmoral estate to begin the transfer of power to Liz Truss. Truss, who was named leader of the ruling Conservative party on Monday, will be appointed prime minister during her own audience with the queen a short time later.