Former UK Prime Ministers, Sir John Major and Tony Blair has warned a vote to leave the EU will “jeopardise the unity” of the UK as they campaigned together in Northern Ireland.
They suggested a Leave vote may re-open Scotland’s independence issue and put Northern Ireland’s “future at risk” by threatening its current stability.
But Northern Ireland Secretary, Theresa Villiers said support for the peace process there was “rock solid.”
She said it would be “highly irresponsible” to suggest otherwise.
The former Conservative and Labour Prime Ministers, who were instrumental in the Northern Ireland peace process in the 1990s, hit the campaign trail there as Remain campaigners attempted to make the future of the UK a key question in the June 23 referendum on EU membership.
It was a message echoed by former US President, Bill Clinton in an article for the New Statesman, who said he worried for Northern Ireland’s “future prosperity and peace” if the UK votes to leave.
Sir John said there was a “serious risk” of another independence referendum and if Scotland found itself out of the EU, he could “envisage a different result” to the one in 2014.
He argued that a vote to leave the EU would also risk “destabilising the complicated and multi-layered constitutional settlement that underpins the present stability in Northern Ireland,” a situation that in his words would be a “historic mistake.”
“It would throw all the pieces of the constitutional jigsaw up into the air again and no-one could be certain where they would land.”
Ireland would be “on the other side of the table” to Britain in its post Brexit negotiations,” he added.
Mr. Blair said Northern Ireland’s prosperity and its political arrangements could be negatively affected by a vote to leave.
Leave campaigners say the free travel area between Ireland and the UK would be retained but Mr. Blair said this would be “difficult if not impossible” because checks would either be needed across the border between the two countries.
Otherwise, he said: “It would make nonsense of their entire argument for leaving which is all to do with the free movement of people in the European Union.”
“We understand that, although today Northern Ireland is more stable and more prosperous than ever, that stability is poised on carefully constructed foundations. And so we are naturally concerned at the prospect of anything that could put those foundations at risk,” he added.