Gypsy, Roma and Traveller

In the United Kingdom, Gypsy, Roma and Traveller (abbreviated to GRT) is an umbrella term to represent certain ethnic groups with a history of nomadism. In the phrase GRT, the Gypsy grouping encompasses Romani people from groups that have resided in Britain since the 16th century, such as the English Gypsies (Romanichal) and Welsh Gypsies (Kale).

Source: Wikipedia — Gypsy, Roma and Traveller (CC BY-SA 4.0)