but today, hardly anyone is aboard brent hearne's sightseeing bus.ritish visitors to ireland have become rare. the looming brexit has had negative consequences for british buying power abroad. >> the currency is the main thing. there's no benefit. before, they were getting 25% benefits so they give 300 sterling for 500 euros. >> naturally, hearne's sightseeing bus passes by dublin's famous guinness brewery. he says brexit will also impact how the beer is produced. >> it goes up to the north. the canning and the bottling. the cans you get in germany. that's done in the north of ireland. and it has to go though a different country. different jurisdiction. because it's part of the uk. >> brexit will complicate irish imports and exports -- almost all trade is done via dublin's harbour, from where it's transported over british soil into the eu. after brexit, this british soil will become non-eu territory. james quinn runs a freight business with 9 drivers. after brexit, trucking to and from europe will take much longer. and cost him more money. >> i think