Theresa May becomes UK prime minister

Theresa May has been formally appointed as the UK's new prime minister.

The former home secretary travelled to Buckingham Palace where she officially accepted the Queen's invitation to form a new government.

She becomes the UK's second ever female PM, after Margaret Thatcher.

In his farewell statement outside Downing Street, Mr Cameron said Mrs May would provide "strong and stable leadership" and wished her well in her negotiations with the EU.

Before Mrs May's visit to Buckingham Palace, the Queen accepted Mr Cameron's resignation as prime minister.

Mrs May, 59, suddenly won the Conservative leadership contest after rival candidate Andrea Leadsom pulled out on Monday.

One of her first tasks will be to appoint her new ministerial team.