British Prime Minister Keir Starmer said Monday that he is resigning as prime minister and leader of the Labour Party.

The resignation signals a period of significant instability for the United Kingdom, which is set to have its sixth prime minister in seven years [4].

Starmer made the announcement during a press conference outside 10 Downing Street in London [2]. He is stepping down from both the premiership and his role as the head of the governing Labour Party [1, 3].

The decision follows mounting pressure from within the Labour Party after the government suffered a heavy defeat in recent local elections [3, 4]. This internal friction comes about two years after Starmer was elected in a landslide victory [5].

Regarding the transition of power, reports on the exact timeline vary. Some sources said Starmer will leave office within weeks [5], while others said he will remain as a caretaker until a successor is chosen this summer [1].

Starmer's departure marks a sudden shift for a government that entered power with a substantial mandate. The Labour Party must now navigate a leadership contest to determine who will lead the country and the party through the remainder of the term.

The UK will have its sixth prime minister in seven years.

The resignation of Keir Starmer underscores a volatile era of British governance characterized by rapid leadership turnover. By resigning both as prime minister and party leader, Starmer triggers an internal Labour Party leadership race, which will determine the UK's policy direction without a general election. This transition occurs against a backdrop of declining local popularity, suggesting the next leader will face a diminished political mandate.