Greece will not leave the euro zone this year but Britain is now more likely to vote to leave the European Union in a referendum, Ladbrokes bookmaker odds showed on Monday after Greeks voted 'no' to bailout terms. Greece is now 2/5 to remain in the euro zone this year while the odds on Britain leaving were cut to 3/1 from 7/2, the bookmaker said. "Betting markets favour their euro zone membership staying intact until the end of the year at least," Ladbrokes spokesman Alex Donohue said of Greece.