Liz Truss officially took over as prime minister on Tuesday after winning the Tory leadership race and immediately confronted the enormous task ahead of her amid increasing pressure to curb soaring prices, ease labor unrest and fix a health care system burdened by long waiting lists and staff shortages.
The morning began with Boris Johnson giving a farewell address outside No 10.
Then, the caretaker prime minister flew to Aberdeen, where he offered his official resignation to the Queen at Balmoral Castle.
He was swiftly followed by Truss, who visited Balmoral Castle to be appointed as leader by the Queen.
Here are some key pictures from the day:
Carrie Johnson accompanies the outgoing prime minister as the couple enter Balmoral Castle.
The new premier shakes hands with the Queen during their meeting at Balmoral Castle. Liz Truss officially left the Castle as the new Prime Minister.
Truss leaves from Balmoral Castle after meeting with the Queen and being invited to form a government.
Truss, 47, took office Tuesday afternoon at Balmoral Castle in Scotland, when Queen Elizabeth II formally asked her to form a new government in a carefully choreographed ceremony dictated by centuries of tradition.
She was chosen as Conservative Party Leader as a replacement for Boris Johnson.