There are now believed to be 30,000 Polish people living in Northern Ireland. This influx has been relatively recent, and has increased since Poland joined the European Union, with many coming on a short term basis for work.hinese is the largest non-native restaurant genre in Northern Ireland, as many of the initial immigrants set up food outlets in order to make a living. According to the Chinese embassy there are nearly 10,000 overseas Chinese resident in Northern Ireland, as of 2007.