Andy Burnham took office Monday as Britain’s new prime minister, promising a 10-year plan to restore political stability and revive the economy while acknowledging that six other U.K. leaders have tried and failed to do so in the past decade.

Speaking outside 10 Downing St. minutes after being formally appointed by King Charles III, Burnham pledged to ease the cost of living for ordinary people, decentralize political power, revitalize industry and end street sleeping by homeless people.