Es sind Zigeuner:

The "problem" is Britain's response to one of its latest waves of immigration – the 70,000 Slovakians who have come to the UK to work since 2004.

Dalena is one of 32 Slovakian children, some from a Roma gypsy background, who have arrived at the Luton Junior School in recent months after their parents arrived to meet local demand for agricultural labour.
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70.000 Slovaken in 3 Jahren, davon sicher 80 bis 90% Zigeuner. Na herzlichen Glückwunsch.

Slovaken sind übrigens keine Slowenen, auch wenn das hier jemand durcheinander gewürfelt hat.