In an interview with German magazine Der Spiegel published last week, Mr Corbyn claimed Labour "can't stop" Brexit as he urged his party to "recognise the reasons why people voted Leave".
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However, speaking to Sky News on Monday, Sir Keir directly countered the stance of his party leader.
"Brexit can be stopped," he said. "But the real question is, what are the decisions we're going to face over the next few weeks and months?
"Decision one is on the deal; decision two is - if the deal goes down - should there be a general election?
"And decision three is - if there's no general election - all options must be on the table, including the option of a public vote.
"That's the clear position and Jeremy's signed up to that, I'm signed up to that, and that was the position that was passed at Labour Party conference."