Europe

London's Labour Party mayor to join Cameron against Brexit

  • Mayor of London, Sadiq Khan, speaks during an event in east London, Thursday May 26, 2016. Official figures show Britain gained 330,000 people through immigration in 2015, a near-historic high, though level from the year before. Sadiq Khan argues that the capital’s strength lies in being open to the world.  (Jonathan Brady/PA via AP) UNITED KINGDOM OUT

    Mayor of London, Sadiq Khan, speaks during an event in east London, Thursday May 26, 2016. Official figures show Britain gained 330,000 people through immigration in 2015, a near-historic high, though level from the year before. Sadiq Khan argues that the capital’s strength lies in being open to the world. (Jonathan Brady/PA via AP) UNITED KINGDOM OUT  (The Associated Press)

  • Banners of opposing views on Britain's so-called Brexit referendum on EU membership are displayed on the balconies of two neighboring flats in the Gospel Oak area of north London, Friday, May 27, 2016. British voters will decide in just under a month whether or not to deal a historic hammer blow to European integration by putting their island nation on an independent path outside the European Union. (AP Photo/Matt Dunham)

    Banners of opposing views on Britain's so-called Brexit referendum on EU membership are displayed on the balconies of two neighboring flats in the Gospel Oak area of north London, Friday, May 27, 2016. British voters will decide in just under a month whether or not to deal a historic hammer blow to European integration by putting their island nation on an independent path outside the European Union. (AP Photo/Matt Dunham)  (The Associated Press)

  • Britain's Prime Minister David Cameron, center right, makes a joint appearance for the Remain campaign with Mayor of London Sadiq Khan, in London, Monday, May 30, 2016. Campaigning is intensifying ahead of the June 23 in-out referendum with Cameron's Conservatives badly split over the issue of Europe. He is opposed by several Cabinet members who favor leaving the EU. Khan joins Cameron on a "Britain Stronger in Europe" bus trip, saying the issue is more important than political differences between the two men. (Yui Mok/PA via AP)       UNITED KINGDOM OUT        -      NO SALES       -      NO ARCHIVES

    Britain's Prime Minister David Cameron, center right, makes a joint appearance for the Remain campaign with Mayor of London Sadiq Khan, in London, Monday, May 30, 2016. Campaigning is intensifying ahead of the June 23 in-out referendum with Cameron's Conservatives badly split over the issue of Europe. He is opposed by several Cabinet members who favor leaving the EU. Khan joins Cameron on a "Britain Stronger in Europe" bus trip, saying the issue is more important than political differences between the two men. (Yui Mok/PA via AP) UNITED KINGDOM OUT - NO SALES - NO ARCHIVES  (The Associated Press)

London's new mayor, a Labour Party member, is joining forces with Prime Minister David Cameron in the campaign to prevent a British exit from the European Union.

Sadiq Khan is making joint campaign appearances Monday with Cameron, the Conservative Party leader who also favors remaining part of the 28-nation bloc.

Campaigning is intensifying ahead of the June 23 in-out referendum with Cameron's Conservatives badly split over the issue of Europe. He is opposed by several Cabinet members who favor leaving the EU.

Khan will join Cameron on a "Britain Stronger in Europe" bus trip. He said the issue is more important than political differences between the two men.

Labour Party leader Jeremy Corbyn has refused to make joint appearances with Cameron, even though they agree on the EU issue.