Irish Travellers

Although Ireland was invaded and colonized within historical times by Celts, Norsemen, Normans, English, and Scots, there are no corresponding ethnic distinctions. Ethnic and racial minorities make up less than 5 percent of the population. However, immigration from Europe, Africa, and Asia was significant in the last two decades of the 20th century. Although they are small in number, the nomadic Travellers ("Tinkers") are perhaps the most prominent ethnic minority group.
(from Britannica)

Irish Travellors, at wikipedia

Irish Travellor homepage

Attitudes towards Migrants and Minorities in Europe , key findings from the Eurobarometer and the European Social Survey by the European Monitoring Centre on Racism and Xenophobia (EUMC)