REUTERS/Denis Balibouse
"I'm confident that we'll have a successful renegotiation and a successful referendum," he told delegates, referring to his plan to reshape his country's EU ties before offering Britons an in/out referendum if he is re-elected next year.
"I'm confident this is do-able, deliverable and, as I say, winnable for Britain to stay in a reformed European Union," he said.
(Reporting By Andrew Osborn; Editing by Stephen Addison)