UPP leader rejects calls for special status post-Brexit
Mr Swann also dismissed Sinn Fein demands for an Irish border poll as “nonsense” as he unveiled his party’s General Election manifesto in Templepatrick.
The party leader insisted if Northern Ireland was granted special designated status following withdrawal from the European Union, it would lead to the break-up of the entire United Kingdom.
His comments come just days after Sinn Fein, the SDLP and Alliance parties all called for special status for the region.
However, according to Mr Swann, this would serve no purpose other than bringing “all sorts of connotations that leaves us outside the UK”.
He added: "It sets us adrift to what it means to be part of the union.
"No-one has anything to fear from being part of the United Kingdom but we all have a lot to lose from leaving it.
"The Union not only is best for the present, but it's best for future generations."
Brexit debate in pictures Mon, April 17, 2017
The debate in the European Parliament in Strasbourg will focus on key issues of the Brexit talks including reciprocal rights for EU citizens, the peace process in Northern Ireland and trade
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Former leader of the UK Independence Party (UKIP) Nigel Farage (L) gestures as he speaks with EU Commission president Jean-Claude Juncker (R) prior to a debate on the conclusions of the last European Council, at the European Parliament in Strasbourg
Mr Swann stressed that there can be no border in the middle of the Irish Sea and no passport checks for citizens of Northern Ireland arriving in Cairnryan or Heathrow.
He said the party's key Brexit priorities include no hard border, or internal borders within the UK, maintenance of the Common Travel Area and assurances for those currently in receipt of EU funds.
Mr Swann went on to claim that a border poll would sectarianise every future election in the region.
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Sinn Fein has demanded an Irish border poll
He said: "No-one has anything to fear from being part of the United Kingdom but we all have a lot to lose from leaving it.
"The Union, that is the United Kingdom of Great Britain and Northern Ireland, not only is best for the present but it's best for future generations.
"I believe the Ulster Unionist Party is best placed to promote the message that a strong, confident and prosperous United Kingdom, of which Northern Ireland remains an integral part, is the best outcome for all of us.”
The UUP leader was also adamant that the EU referendum “is done” and insisted that instead of "re-arguing that argument" he would push for the best deal possible for Northern Ireland.
The party has also vowed to secure the "best possible deal" for the region in the event of a "bungled Brexit deal".
"Despite having potentially the most to lose from a bungled Brexit deal, Northern Ireland remains by far the least prepared of any UK region," the manifesto says.
It adds: "This issue is so important to all our futures that we need the best deal, not just any deal, or worse, no deal."
Legacy issues are also mentioned within the UUP manifesto, with the party vowing to "vehemently oppose efforts to rewrite the reality of the past and tackle unfair aspersions cast against legitimate actions of our security forces".
He said: “Calls by some for a second EU referendum following negotiations are a thinly veiled attempt to reverse the decision taken by the people of the United Kingdom in the referendum last year. And it also weakens our negotiating hand with the EU.”