Staff applaud as Britain's new Prime Minister Theresa May, and her husband Philip, walk into 10 Downing Street after May had met Queen Elizabeth in Buckingham Palace, in central London, Britain July 13, 2016.
The UK's new prime minister Theresa May has vowed to lead a "one nation" government that works for all not just the "privileged few".
David Cameron said shortly before resigning Wednesday that serving as prime minister for six years was "the greatest honor of my life" in his last speech outside 10 Downing St.
It was Cameron's last Prime Minister's Questions on Wednesday, ahead of giving his resignation to Queen Elizabeth II.
"Her Majesty was graciously pleased to accept", the resignation, a spokesman for the queen said in a statement.
British Prime Minister David Cameron on Wednesday said serving as Prime Minister was his greatest honour.
The Prime Minister becomes the second female leader of the United Kingdom since Margaret Thatcher who was in power from 1979 to 1990.
"First, the need for strong, proven leadership to steer us through what will be hard and uncertain economic and political times, the need, of course, to negotiate the best deal for Britain in leaving the European Union, and to forge a new role for ourselves in the world", she said.
Just moments after the former Conservative leader's departure from the Palace, a vehicle carrying his successor arrived. The Sun said Cameron had been "undone by his Olympian overconfidence", while the Guardian called him a "prime minister of broken promises".
She also stressed that the full name of the Conservative party was the Conservative and Unionist party, and she would safeguard the union between England, Scotland, Wales and Northern Ireland - as Scotland threatens to break away after the vote to leave the EU.
She said she wanted to address the poorest and most disadvantaged in society, and the people who had been left behind.
May, who backed remaining in the European Union, will also be expected to reward prominent campaigners for a "leave" vote with key jobs.
Mrs May was summoned to the Palace following David Cameron's resignation, and was asked whether she could command a government.
"As I leave today, I hope that people will see a stronger country, a thriving economy, and more chances to get on in life", he told 'The Daily Telegraph' in one of his farewell interviews.
The cardinal added: "As you take up this new and demanding office of prime minister, I assure you of my personal support, and I look forward to working with you across a wide range of issues in service of the common good".