The hard line over Brexit taken by Boris Johnson in his first speech in the House of Commons as British prime minister suggests a strategy that will inevitably lead to an early general election.

Theresa May has formally resigned as Conservative leader, a senior Tory source said.

British MPs Heidi Allen, Anna Soubry and Sarah Wollaston have resigned from the Conservative Party and joined the Independent Group.

French conservatives have voted in their first nationwide primary to choose a nominee for next year's presidential election after a campaign marked by concerns about immigration and Islamic extremism.