Sir Keir Starmer has told voters the UK's future is in "your hands", saying "together we can stop the chaos, we can turn the page, we can start to rebuild Britain".
Speaking shortly after Rishi Sunak announced a general election on 4 July, the Labour leader said the vote would be a chance to change the country "for the better".
He said: "It will feel like a long campaign, I am sure of that, but no matter what else is said and done, that opportunity for change is what this election is about."
In a preview of Labour's election campaign, he said: "Our offer is to reset both our economy and our politics."