Keir Starmer to stand down as MP weeks after leaving Downing Street

Keir Starmer has announced he will resign his seat in Parliament, triggering a by-election in his Holborn and St Pancras constituency. The former Prime Minister, who left office last month after Labour's election defeat, confirmed the decision in a statement released this morning.

The BBC, Guardian and Sun all carry the resignation, with the Independent publishing Starmer's statement in full. GB News reports that Reform UK will contest the seat, with Sarah Pochin confirming the party's intention to challenge for what has been a safe Labour constituency. The Sun notes the by-election will follow weeks after Starmer stood down as Prime Minister.

The timing invites the obvious question: why now, and not at the general election itself? A Prime Minister leaving office mid-term typically stays on as a backbencher - John Major did, Gordon Brown did, Theresa May is still there. Immediate departure is rarer, and usually signals either a peerage on the way or a desire to avoid the awkwardness of sitting behind your successor. Starmer has given no public reason yet for the timing, and none of the outlets cite one.

What to watch: the date of the by-election, and whether Labour holds the seat. Holborn and St Pancras returned Labour majorities reliably for decades, but by-elections in safe seats after short-lived governments have gone wrong before - and Reform's interest suggests they see an opening.