Voters in the U.K. are casting their ballots in a national election to choose the 650 lawmakers who will sit in Parliament for the next five years. Prime Minister Rishi Sunak surprised his own party on May 22 when he called the election, which could have taken place as late as January 2025.

After 14 years in power under five different prime ministers, Prime Minister Rishi Sunak’s Conservatives are widely expected to lose to the main opposition party, the left-of-center Labour Party led by Keir Starmer. Sunak’s party has struggled to reassure voters on issues including the rising cost of living and a crisis in the National Health Service.