Leader of the opposition Jeremy Corbyn has said that Brexit would go ahead if Labour won a snap election in the New Year.
Corbyn has insisted he would try and secure a better deal with Brussels should Labour take power but refused to rule out a second EU referendum.
"My proposal at this moment is that we go forward, trying to get a customs union with the EU, in which we would be able to be proper trading partners," Corbyn said in an interview with the Guardian.
He added that it would be "a matter for the party to decide" regarding Labour's stance on a second referendum and he also criticised the EU on its rules on state aid and competition.
"I think the state aid rules do need to be looked at again, because quite clearly, if you want to regenerate an economy, as we would want to do in government, then I don't want to be told by somebody else that we can't use state aid in order to be able to develop industry in this country," Corbyn added.
Corbyn also denies calling Theresa May a "stupid woman" at Prime Minister's Questions earlier this week during a heated debate and maintains he said "stupid people".
Responding to criticism from Tory MPs over the alleged remark, Corbyn said: "It's interesting their sudden concern about these matters. Where is their concern about the homeless people of this country?"
MPs will debate May's Brexit deal when Parliament returns following the Christmas break, before a vote on the deal takes place the week commencing 14 January.