Amid the growing tensions over Brexit and the border, photojournalist Charles McQuillan met people whose work takes them across the frontier. Many expressed fears about the future and the possible return of old divisions
In June 2016, Britain voted to leave the EU by 52% to 48%, but Northern Ireland voted by 56% to remain. The frontier between Northern Ireland and the Republic of Ireland, which runs for 310 miles, is the only border between the UK and the EU. During the Northern Ireland conflict of the latter 20th century, this border was controlled by police and soldiers.