Berwick MP Anne-Marie Trevelyan has backed a European Union exit, saying the UK-EU renegotiations will achieve little.
She made the statement as Prime Minister David Cameron continues his efforts to change some aspects of the UK’s membership of the EU.
Mrs Trevelyan said: “I have always been clear that unless dramatic changes to our relationship with the EU is actually achieved I will be personally be voting to leave the EU, and campaigning in the same way.
“I have consistently supported the Prime Minister’s efforts to secure a new deal from the EU, but it has become clear that despite the Greek crisis, the refugee crisis, border control chaos, and economic stagnation the EU still doesn’t see the need for fundamental reform.
“We need new relationships with our European allies and the only way that will be possible is to Vote Leave.”
An in-out referendum is due to be held by the end of next year.
She has been backed by five other newly-elected MPs. They are James Cleverly, Scott Mann, Craig Mackinlay, Royston Smith and Paul Scully.