The Democratic Unionist Party has insisted it will continue to vote against Prime Minister Theresa May's Brexit deal.

The party's Brexit spokesman Sammy Wilson told the BBC: "The implications for Northern Ireland are far, far too serious.

"First of all, it would take us away from the country that we fought to stay part of.

"And secondly, it would break us away from the economy on which we are dependent.

"Because, of course, the GB economy is the most important economy given where we export our goods and bring our goods from."

READ MORE: MPs to take back control of Brexit agenda

In the wake of Tory chief whip Julian Smith saying the Government should have made it clear that a softer Brexit was inevitable after the 2017 general election, Chief Secretary to the Treasury Liz Truss told BBC Radio 4's Today programme: "It's not clear to me that going softer is the way to command support."

She added: "If you look at the parliamentary arithmetic now, It's not clear that something like a customs union actually commands support."

Ms Truss said: "I think that we are well prepared for no deal.

"I don't have any fear of no deal."

Referring to the chief whip's comment that the Cabinet was the most ill-disciplined in history, Ms Truss said: "It's difficult to compare Cabinets through the ages.

"Of course, this is an incredibly testing time; it's a time when we have got a minority Government.

"And there are differences of opinion, I won't deny that."

Ms Truss said: "The will of Parliament so far has not been in favour of a customs union.

"I think the answer lies in modifications to the Prime Minister's deal to be able to get that to have support."

READ MORE: Alan Roden: If Parliament can't decide on Brexit, then ask the people to choose.

Tory Brexiteer Jacob Rees-Mogg has said he is "very concerned" that Theresa May will add a customs union onto her Brexit deal.

He told LBC radio: "My concern is that the Prime Minister is more concerned to avoid a no-deal Brexit than anything else.

"And therefore I am very concerned that she could decide to go for a customs union tacked onto her deal."

Mr Rees-Mogg also said Friday's vote on the Brexit deal would "probably have gone through" if it has been Mrs May's deal versus a general election.