LONDON — The Conservative Party swept to power Friday in Britain’s parliamentary elections, winning an unexpected majority that returns Prime Minister David Cameron to 10 Downing Street in a stronger position than before.

In announcing his majority Conservative government, Cameron signaled a conciliatory tone, paying tribute to his former coalition partner, Liberal Democrat Nick Clegg, and the opposition Labour Party’s Ed Miliband. Both resigned as leaders of their parties Friday after disappointing election results.

“We can make Britain a place where a good life is in reach for everyone who is willing to work and do the right thing,” Cameron said. He promised to counter the rise of Scottish nationalism with more powers for Scotland and Wales, saying he would govern as the party of “one nation, one United Kingdom.”

Cameron announced his new government after meeting with Queen Elizabeth II. It came much quicker than expected; pre-election polls had shown the Conservatives locked in a tight race with the opposition Labour Party, raising the possibility of days or weeks of negotiations to form a government.

Labour took a beating, mostly from energized Scottish nationalists who pulled off a landslide in Scotland.