Boris Johnson launches UK Tory leadership campaign

Frontrunner in Conservative leadership race offers no details on how he can deliver a different Brexit trade deal.

The politician tipped to become Britain’s next prime minister has launched his campaign to become Conservative party leader.

Boris Johnson is vowing to leave the European Union by October with or without a Brexit trade deal.

But he faces many questions about his suitability for the top job.

Al Jazeera’s Laurence Lee reports from London.