An undemocratic Labour MP has been sacked by leader Jeremy Corbyn for not accepting a democratic decision.
Owen Smith says he "stood by his principles" in calling for another EU referendum - a move which resulted in his sacking from Labour's shadow cabinet.
The former Shadow Northern Ireland Secretary said Jeremy Corbyn had made a "mistake" in firing him.
He also said the party should "shift its position" on Brexit.
Mr Smith was asked to stand down on Friday after he wrote an article for the Guardian calling for a second vote.
Smith ran for the Labour Party leadership in 2015, a contest which was won by Corbyn.
Labour's Owen Smith 'stood by principles' on Brexit
BBC News
24 March 2018
Owen Smith said Labour needed to do more than just back a 'soft Brexit'
Owen Smith says he "stood by his principles" in calling for another EU referendum - a move which resulted in his sacking from Labour's shadow cabinet.
The former Shadow Northern Ireland Secretary said Jeremy Corbyn had made a "mistake" in firing him.
He also said the party should "shift its position" on Brexit.
Mr Smith was asked to stand down on Friday after he wrote an article for the Guardian calling for a second vote.
Speaking about his sacking on BBC Radio 4's Today programme, he said: "I think it is a mistake, for Jeremy Corbyn in particular, who has always understood the value of people standing by their principles.
"It is the position that he has often adopted, and it is certainly a value in him that others have extolled."
"In truth I think that is all I have done. I have stood by my principles."
Mr Smith said leaving the EU was "the biggest economic crisis that our country will have faced for many, many generations" and he believed Labour should stand against it.
Referring to Mr Corbyn's views on Brexit as "a more Eurosceptic position", he added: "It's the first instance that I can think of in living memory of a government pursuing a policy that they know is going to make our economy smaller and reduce people's livelihoods and life chances and I cannot understand why we in Labour would support that."
'Disappointing'
Party figures have criticised Mr Corbyn's decision to sack Mr Smith, with Labour peer Peter Hain describing the dismissal as a "Stalinist purge".
The former Northern Ireland Secretary said Mr Smith was widely respected for his work in the role.
Labour MP Chuka Umunna said it was "extraordinary" that the shadow minister had been sacked for advocating a Brexit policy which, he said, had wide support in the party.
Fellow MP Anna Turley said Mr Smith's departure was "disappointing" and he would be a loss to the front bench, while former cabinet minister Ben Bradshaw told Mr Smith he was "very sorry" to see him go.
However, Shadow Home Secretary Diane Abbott said although Mr Smith was "a valued colleague", he could not sit on the opposition front bench while advancing "a position which was simply not Labour Party policy".
Ms Abbott, who in November told constituents she would push for a referendum on the final Brexit deal - before clarifying she wanted a Parliamentary vote - said Mr Smith would be able to "make a contribution to the debate" outside the shadow cabinet.
BBC Newsnight's political editor Nick Watt said supporters of Mr Corbyn thought Mr Smith "wasn't very collegiate" and had defied collective responsibility.
Mr Watt also reported that friends of Mr Smith complained that journalists knew about the sacking before Mr Corbyn phoned him - a claim disputed by the Labour leader's office.
Mr Smith has been replaced by Rochdale MP and shadow housing minister Tony Lloyd.
Mr Corbyn said that Mr Lloyd was "highly experienced" and "committed to ensuring that peace in Northern Ireland is maintained", as well as helping to steer the devolution deal "back on track".
Tony Lloyd was previously Shadow Minister for Housing, Communities and Local Government and the Greater Manchester Police and Crime Commissioner
In a tweet, Mr Smith said his concerns about Brexit, which he outlined in a Guardian article, were shared by other supporters and members of the Labour Party.
Owen Smith ✔
@OwenSmith_MP
Just been sacked by @jeremycorbyn for my long held views on the damage #Brexit will do to the Good Friday Agreement & the economy of the entire U.K. Those views are shared by Labour members & supporters and I will continue to speak up for them, and in the interest of our country.
6:25 PM - Mar 23, 2018
33.9K 17.3K people are talking about this
In the article, Mr Smith called for Labour to back membership of the EU single market.
The Labour leader announced last month that the party wanted the UK to be a permanent member of a customs union with the EU after Brexit.
But Mr Smith, who unsuccessfully challenged Mr Corbyn for the party leadership in 2016, insisted Labour needed to do more than "just back a soft Brexit or guarantee a soft border in Ireland".
He wrote: "If we insist on leaving the EU then there is realistically only one way to honour our obligations under the Good Friday Agreement and that is to remain members of both the customs union and the single market."
Labour's Shadow Brexit Secretary Sir Keir Starmer has said the party was "not calling for a referendum at this stage".
Labour's Owen Smith 'stood by principles' on Brexit - BBC News
Owen Smith says he "stood by his principles" in calling for another EU referendum - a move which resulted in his sacking from Labour's shadow cabinet.
The former Shadow Northern Ireland Secretary said Jeremy Corbyn had made a "mistake" in firing him.
He also said the party should "shift its position" on Brexit.
Mr Smith was asked to stand down on Friday after he wrote an article for the Guardian calling for a second vote.
Smith ran for the Labour Party leadership in 2015, a contest which was won by Corbyn.
Labour's Owen Smith 'stood by principles' on Brexit
BBC News
24 March 2018
Owen Smith said Labour needed to do more than just back a 'soft Brexit'
Owen Smith says he "stood by his principles" in calling for another EU referendum - a move which resulted in his sacking from Labour's shadow cabinet.
The former Shadow Northern Ireland Secretary said Jeremy Corbyn had made a "mistake" in firing him.
He also said the party should "shift its position" on Brexit.
Mr Smith was asked to stand down on Friday after he wrote an article for the Guardian calling for a second vote.
Speaking about his sacking on BBC Radio 4's Today programme, he said: "I think it is a mistake, for Jeremy Corbyn in particular, who has always understood the value of people standing by their principles.
"It is the position that he has often adopted, and it is certainly a value in him that others have extolled."
"In truth I think that is all I have done. I have stood by my principles."
Mr Smith said leaving the EU was "the biggest economic crisis that our country will have faced for many, many generations" and he believed Labour should stand against it.
Referring to Mr Corbyn's views on Brexit as "a more Eurosceptic position", he added: "It's the first instance that I can think of in living memory of a government pursuing a policy that they know is going to make our economy smaller and reduce people's livelihoods and life chances and I cannot understand why we in Labour would support that."
'Disappointing'
Party figures have criticised Mr Corbyn's decision to sack Mr Smith, with Labour peer Peter Hain describing the dismissal as a "Stalinist purge".
The former Northern Ireland Secretary said Mr Smith was widely respected for his work in the role.
Labour MP Chuka Umunna said it was "extraordinary" that the shadow minister had been sacked for advocating a Brexit policy which, he said, had wide support in the party.
Fellow MP Anna Turley said Mr Smith's departure was "disappointing" and he would be a loss to the front bench, while former cabinet minister Ben Bradshaw told Mr Smith he was "very sorry" to see him go.
However, Shadow Home Secretary Diane Abbott said although Mr Smith was "a valued colleague", he could not sit on the opposition front bench while advancing "a position which was simply not Labour Party policy".
Ms Abbott, who in November told constituents she would push for a referendum on the final Brexit deal - before clarifying she wanted a Parliamentary vote - said Mr Smith would be able to "make a contribution to the debate" outside the shadow cabinet.
BBC Newsnight's political editor Nick Watt said supporters of Mr Corbyn thought Mr Smith "wasn't very collegiate" and had defied collective responsibility.
Mr Watt also reported that friends of Mr Smith complained that journalists knew about the sacking before Mr Corbyn phoned him - a claim disputed by the Labour leader's office.
Mr Smith has been replaced by Rochdale MP and shadow housing minister Tony Lloyd.
Mr Corbyn said that Mr Lloyd was "highly experienced" and "committed to ensuring that peace in Northern Ireland is maintained", as well as helping to steer the devolution deal "back on track".
Tony Lloyd was previously Shadow Minister for Housing, Communities and Local Government and the Greater Manchester Police and Crime Commissioner
In a tweet, Mr Smith said his concerns about Brexit, which he outlined in a Guardian article, were shared by other supporters and members of the Labour Party.
Owen Smith ✔ @OwenSmith_MP
Just been sacked by @jeremycorbyn for my long held views on the damage #Brexit will do to the Good Friday Agreement & the economy of the entire U.K. Those views are shared by Labour members & supporters and I will continue to speak up for them, and in the interest of our country.
6:25 PM - Mar 23, 2018
33.9K 17.3K people are talking about this
In the article, Mr Smith called for Labour to back membership of the EU single market.
The Labour leader announced last month that the party wanted the UK to be a permanent member of a customs union with the EU after Brexit.
But Mr Smith, who unsuccessfully challenged Mr Corbyn for the party leadership in 2016, insisted Labour needed to do more than "just back a soft Brexit or guarantee a soft border in Ireland".
He wrote: "If we insist on leaving the EU then there is realistically only one way to honour our obligations under the Good Friday Agreement and that is to remain members of both the customs union and the single market."
Labour's Shadow Brexit Secretary Sir Keir Starmer has said the party was "not calling for a referendum at this stage".
Labour's Owen Smith 'stood by principles' on Brexit - BBC News