Keir Starmer is a British politician and former lawyer who became Prime Minister of the United Kingdom on 5 July 2024 after leading Labour to victory in the general election.

What he did

  • Qualified as a barrister in 1987 and worked in private practice, including human rights work.
  • Served as legal adviser to the Northern Ireland Policing Board.
  • Became Director of Public Prosecutions in 2008 and led the Crown Prosecution Service until 2013.
  • Helped shape prosecutions and justice policy, including work tied to major cases and support for victims of sexual and domestic violence.
  • Entered Parliament in 2015 as MP for Holborn and St Pancras, then became Labour leader in April 2020.
  • Became Prime Minister in 2024.

In plain English

If you’re asking “what did Keir Starmer do?” in a general sense, the short answer is: he went from lawyer and chief prosecutor to Labour leader and then Prime Minister. His public image has been shaped by law, prosecutions, and a politics-focused shift that helped Labour regain power.

Why people talk about him

He’s often discussed because his career mixes law and politics, and because his move toward the political center was seen as a big reason Labour became electorally successful again. More recent reporting says he was forced out less than two years after the 2024 election, showing how quickly his political standing changed.

TL;DR: Starmer was a lawyer, then chief prosecutor, then Labour leader, then UK Prime Minister.