Starmer leaves Parliament six weeks after leaving Downing Street

Keir Starmer said on 1 September that he will stand down as the Member of Parliament for Holborn and St Pancras. The announcement came six weeks after he left 10 Downing Street and hours before Andy Burnham, who replaced him as Labour leader and prime minister in July, made his first appearance in the Commons in that role.

Starmer told the Camden New Journal, the local paper in his north London seat, that it had been a huge honour to represent the constituency for 11 years and that it was the right time to pass the baton. He said he would now concentrate on international affairs, including defence, security, trade and technology. He added that he would keep working on violence against women and girls, a brief he held before he entered the House in 2015.

In July he had told the BBC he would stay on the back benches until the next general election, which must come by 2029. He changed his mind. The written statement on X confirmed the local interview. Conservative Party chairman Kevin Hollinrake called it fitting that Starmer's last act as a lawmaker was to reverse a pledge.

The resignation forces a by-election in a seat Labour has held for decades. In 2024 Starmer won it with a majority just above 11,500. An independent candidate who campaigned against Israel's war in Gaza took nearly 19 percent. The Green Party's Zack Polanski has said he has long wanted a London seat. Burnham's first electoral test as prime minister will therefore arrive sooner than a general election and in a constituency that is no longer a simple walkover.

Starmer's arc is short and steep. He became Labour leader after the 2019 defeat, the party's worst result since 1935. In 2024 he led it to one of the largest modern Commons majorities. Local election losses in 2026 and a collapse of confidence among Labour MPs ended the premiership in June and July. Burnham's arrival produced a bounce in the polls. The bounce has not yet been measured against a real ballot in London.

Foreign policy was the part of Starmer's record that even critics often treated as competent. He spent political capital on Ukraine, on the Hormuz file and on European security after Britain had left the EU. That is the market he now says he will enter as a private figure. He has not named an institution, a government or a firm. David Cameron and Tony Blair both left the Commons soon after leaving Downing Street and built international portfolios. Starmer is following that path, not the Theresa May path of staying on the benches for years.

Holborn and St Pancras is not a random patch of London. It covers parts of Camden that mix universities, hospitals, council estates and the professional class that staffs Whitehall and the courts. Starmer is a former Director of Public Prosecutions. The seat fitted the lawyer. The by-election will test whether the lawyer's party still fits the seat after a year of Labour infighting and after Gaza polarised a slice of the same voters who gave him 19 percent of protest in 2024.

Burnham's message on Tuesday was gracious. He said Starmer took Labour from one of its worst defeats to one of its best victories and built a platform the new leadership intends to use. That sentence is the official closing of a chapter. The unofficial one will be written by whoever wins Holborn and St Pancras and by whatever job Starmer actually takes. Until the writ is moved, the former prime minister is still, on paper, an MP who has announced he is leaving. The date of the contest will tell the country how fast Burnham wants the test.