Brexit vote makes united Ireland suddenly thinkable

By Conor Humphries and Amanda Ferguson BELFAST (Reuters) - Protestant unionists are queuing for Irish passports in Belfast and once quiet Catholic nationalists are openly campaigning for a united Ireland, signs of deep shifts in the United Kingdom's most troubled province since Britain voted to leave the EU. Eighteen years after a peace deal ended decades of fighting between mainly Catholic nationalists who favour a united Ireland and mainly Protestant unionists who favour remaining part of the