LONDON (news agencies) — After a few hours of sleep to shake off a night of celebration and an audience with the king, Keir Starmer stepped through the front door of 10 Downing St. for the first time as prime minister on Friday.
When he did, he entered the alternate reality of a man who meets regularly with King Charles III and has ultimate control of Britain’s nuclear missiles, all while adjusting to life in a creaking 17th century landmark and trying to balance his work and personal life.
On his first day in office, Starmer will get briefings from senior civil servants about key issues facing the government, receive congratulatory phone calls from world leaders and begin the process of appointing his Cabinet.
Here is a look at some of the other traditions and responsibilities he faces on his first day inside No. 10.
The first time a prime minister walks through the uber-polished door of 10 Downing St., household staff and civil servants by custom line the entrance and clap for the new leader and his senior team.
It is Starmer’s introduction to the people he will live and work with, most of whom served his predecessor only a few hours earlier.
Salma Shah, a special adviser to former Treasury chief Sajid Javid, described the custom as equal parts nice gesture and strange experience, particularly given that the civil servants know little or nothing about the latest batch of politicians moving into the heart of British government.
“I’ve often mused over the fact that no one really claps you on the way out whenever you leave your job,’’ she said during a briefing about the first days of a new administration sponsored by the Institute for Government think tank. “So it’s nice, but it is also quite odd.’’
One of the most sobering moments of any prime minister’s first day on the job is the realization that he now has the ultimate authority over whether to launch Britain’s nuclear missiles.
In the U.K., this is underscored when the country’s top civil servant informs the new prime minister that he has to write “last resort letters” to the captains of Britain’s four nuclear-armed submarines telling them what to do in the event of a nuclear attack that wipes out the civilian leadership.
It is a duty unique to Britain, where there is no “nuclear football,” the briefcase carrying targeting data and launch codes that accompanies the U.S. president wherever he goes.
The letters are placed on board each of the submarines inside safes that are to be opened only if their captains are certain Britain has been attacked and the country’s civilian leaders are dead.
While the letters are destroyed unread when a new prime minister takes office, there are thought to be only four options: retaliate, don’t retaliate, use your own judgment, or put your nuclear weapons under the command of the U.S. or Australia, if possible.
No. 10 Downing St. is as much of a shorthand for Britain’s prime minister as the White House is for the U.S. president. But that’s about all they have in common.
Behind the famous black door of No. 10 sits a warren of interlinked offices, meeting rooms and two residences carved out of three townhouses built in the late 1600s.
With an estimated 400 people working in some 100 offices, the space has become dysfunctional, a workplace consultant said two years ago, recommending that the prime minister’s top team move to a modern office space.
“It’s clear that 10 Downing St. isn’t fit for purpose and much of the muddled decision-making afflicting the government may stem from not having a proper office,” Andrew Mawson, managing director of Advanced Workplace Associates, said in 2022. “No major corporation – or indeed government department – operates from a largely unreconstructed 300-year-old building or has the CEO living above the shop.”
One of the first decisions Britain’s new prime minister will have to make is whether to live in the two-bedroom apartment above 10 Downing St., traditionally the home of Britain’s leaders, or the more spacious four-bedroom apartment over No. 11, formerly dedicated to the treasury chief.
Starmer, who is married and has two teenage children, is likely to follow recent precedent and claim the larger apartment. Other than his predecessor, Rishi Sunak, every prime minister since Blair has picked that option.
No. 10 Downing St. is part of a row of townhouses built between 1682 and 1684 by former diplomat and property developer George Downing. The home of Britain’s prime ministers since 1735, it has been expanded over the years by linking it to the adjoining properties at No. 11 and No. 12.
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