'Brexit' odds shorten as London mayor Johnson supports 'out' campaign

The odds of Britain leaving the European Union shortened on Sunday after reports that influential London mayor Boris Johnson would back the 'leave' campaign, bookmaker Ladbrokes said. The bookmaker said the odds of a British exit had improved to 2/1 from their previous price of 12/5. Johnson had also become favourite to be the next leader of the Conservative Party when Cameron decides to step down, they said.