Former Prime Minister Sir Keir Starmer has announced his decision to stand down as a Member of Parliament, a move that will trigger a by-election in his long-held London constituency of Holborn and St Pancras. Sir Keir, who has represented the seat since 2015, had previously suggested he would remain in Parliament until the next UK general election, which is not scheduled until 2029. However, in a surprise statement issued just hours before his successor, Prime Minister Andy Burnham, was set to make his debut in the House of Commons, Sir Keir confirmed he is leaving to focus on international affairs and advocacy work.
Speaking to the Camden New Journal, Sir Keir described his 11 years representing the London constituency as a "huge honour and privilege." He stated that he felt it was the "right time" to "pass the baton to a successor" and depart from Parliament. Regarding his future, Sir Keir noted that he intends to focus on global issues, specifically mentioning defence, security, trade, and technology in what he described as a "fast-changing world." Additionally, he plans to continue his long-standing work on combating violence against women and girls, a cause he noted he was involved with before entering Parliament and one he remains committed to pursuing afterward.
The timing of the announcement, coming just before Prime Minister Andy Burnham's first statement in the Commons, drew criticism from the opposition. Conservative chairman Kevin Hollinrake accused Sir Keir of making "another U-turn having pledged to stay on," and argued that the resignation would result in a "costly by-election for taxpayers." A formal date for the by-election will not be established until Sir Keir officially resigns his seat in the Commons.
Holborn and St Pancras has historically been a Labour stronghold. In the 2024 general election, Sir Keir secured a majority of more than 11,000 votes. While candidates for the upcoming by-election have not yet been confirmed, the Green Party is expected to be the primary challenger. In recent local elections, the Greens secured 29.8% of the vote in the wards making up the constituency, compared to Labour's 39.5%. The Green Party has indicated that its leader, Zack Polanski, who currently serves on the London Assembly, is considering a run for the seat, noting that he has "always made it clear he would like to be a London MP."
Sir Keir’s decision to stand down so soon after leaving Downing Street marks a departure from recent political precedent. While former Prime Ministers Boris Johnson and David Cameron resigned from the Commons shortly after leaving office, others have remained for longer periods. Rishi Sunak has continued to serve as the MP for Richmond and Northallerton two years after his time in No 10, and his predecessor Liz Truss remained a backbencher until losing her seat in the 2024 election.
Theresa May also remained in Parliament for five years following her departure from Downing Street. When asked in July about his future career prospects, Sir Keir had admitted he did not know if he had another major political or international role in his future, but his latest announcement signals a clear shift toward international diplomacy.
