Theresa May becomes new British Prime Minister

Theresa May struck a populist tone in her first public remarks as British Prime Minister on Wednesday, saying she planned to continue predecessor David Cameron's "true legacy" of social justice.

The Conservative Party leader spoke directly to the poor, black and white working-class residents as well as women, youth and those with mental health issues, saying, "The government I lead will be driven not by the interests of a privileged few, but by yours."

Her party prizes unionism, she said, and not just among England, Wales, Scotland and Northern Ireland, "but between all of our citizens, everyone, whoever we are and wherever we're from."

"David Cameron has led a one-nation government, and it is in that spirit that I also plan to lead," she said.

In his final appearance in Parliament as Prime Minister, Cameron opened with the quip that "apart from one meeting in the afternoon with the Queen, my diary is remarkably light."

Before resigning, Cameron delivered remarks outside 10 Downing Street, saying, "It's not been an easy journey, and of course we've not got every decision right, but I do believe that today our country is much stronger."

He wished May the best, especially as she negotiates the country's "Brexit" from the European Union. If he were granted one wish, he said, it would be the "continued success of this great country that I love so very much."