It comes as the Supreme Court ruled Theresa May needs the approval of Parliament to invoke Article 50.
Eight out of the 11 justices decided MPs must vote on the issue, but the government doesn't have to consult the devolved powers of Northern Ireland, Scotland or Wales.
In response Labour leader Jeremy Corbyn said his MPs would be ordered to vote with the government and trigger Article 50.
But in an exclusive interview with Premier the Christian MP Stephen Timms revealed he may defy his leader because his constituency voted remain.
"I'm reflecting on that," he said.
He added that he thought it was a "very serious misjudgement" of Theresa May to try and start the process of leaving the EU without consulting parliament.
"I shall be reflecting over the next couple of days which way I will vote when that decision comes.
"The key consideration for me is safeguarding the jobs of my constituents in East London".
Conservative MP and the Church of England's representative in parliament, Caroline Spelman, said she would vote to trigger Article 50.
Speaking with Premier added: "As an elected representative I'm not going to defy the result... It think when it comes to the vote the vast majority of members of parliament are likely to support the triggering of article 50 whether they were for or against our membership".
The Prime Minister has indicated she wants to start the process of leaving the EU by the end of March this year.
