MANCHESTER, England (AP) — The left-of-center politician aiming to become Britain’s prime minister in three weeks’ time said Thursday he will lead a government that’s both “pro-business and pro-worker” and restore stability after years of economic and political turmoil.

Labour Party leader Keir Starmer said that if he’s elected on July 4, he will end the “desperate era of gestures and gimmicks” of the Conservative Party’s turbulent tenure.

Launching Labour’s election manifesto in the northwest England city of Manchester, Starmer said a Labour government would “stop the chaos, turn the page and start to rebuild our country.”

Next month British voters will elect lawmakers to fill all 650 seats in the House of Commons, and the leader of the party that can command a majority — either alone or in coalition — will become prime minister. Labour currently has a double-digit lead in opinion polls over Prime Minister Rishi Sunak ’s governing Conservatives, who have been in power for 14 years under five different prime ministers.

The Conservatives jettisoned two prime ministers without an election in quick succession in 2022: first Boris Johnson, felled by scandals, then Liz Truss, who rocked the economy with drastic tax-slashing plans and lasted just seven weeks in office.

Starmer, a former chief prosecutor who is widely seen as competent but dull, is trying to turn his stolid image into an asset. His core message is that he has transformed Labour from its high-taxing, big-spending days under former leader Jeremy Corbyn into a party of the stable center.

Starmer said his platform was “a manifesto for wealth creation,” and acknowledged that a Labour government would face “hard choices” about public spending.

“We cannot play fast and loose with the public finances,” he said. He said he rejected the idea that “the only levers are tax and spend,” and would get the economy expanding after years of sluggish growth.

Starmer’s cautious economic approach dismays some in his party, who want bolder change, but has won the support of many business leaders.

Starmer called the party's platform a manifesto for “wealth creation,” and its ambitious goals were largely long-term ones: establishing a new industrial policy, developing a 10-year infrastructure strategy, building 1.5 million new homes.

Labour pledged to improve ties with Britain’s former partners in the European Union, but ruled out a return to the bloc’s frictionless single market and customs union.

The plan's spending commitments were modest. The manifesto forecasts that taxes will rise by 7.4 billion pounds ($9.25 billion) by 2028-29, through measures including by closing loopholes related to the recent abolition of the “non-domiciled” tax status, which has allowed some wealthy individuals to avoid paying U.K. taxes. The party is also planning to extend a windfall tax on energy companies.

Starmer said personal taxes would not rise under a Labour government, but that did not stop the Conservatives casting Labour as the high-tax party.

“If you think they’ll win, start saving,” Sunak wrote on X, formerly Twitter.

Starmer spoke at the headquarters of the Co-op, a Manchester-founded cooperative society that has grown into a large retail and services empire. He introduced several voters, including a father whose family of four live in a one-bedroom apartment, and Nathaniel Dye, a man with terminal cancer campaigning for faster treatment.

The only unscripted moment came from a demonstrator calling for Labour to have tougher climate change policies, who was swiftly removed.

Sunak released the Conservative manifesto — the party's key handbook of promises — on Tuesday, pledging to cut taxes and reduce immigration if the Conservative Party is reelected.

Labour's 131-page manifesto included previously announced plans, with little in the way of last-minute treats to woo voters.

“It’s not about rabbits out of a hat, it's not about pantomime,” Starmer said. “I’m running as a candidate to be prime minister, not a candidate to run the circus.”