British voters are participating in a parliamentary election with expectations favoring the Labour Party's rise to power over the Conservative Party led by Prime Minister Rishi Sunak. The election is marked by concerns about the economy, infrastructure, and healthcare. Labour's Keir Starmer leads in opinion polls but warns against complacency, urging supporters to vote. The Conservatives fear a potential Labour supermajority and emphasize the need to limit Labour's power. Despite past defeats, Labour's campaign has garnered support and endorsements, signaling a potential significant shift in power dynamics.