New figures show Wales' foreign-born population has risen by 82% over the last decade. That's proportionally more than in England or Northern Ireland. Our health and social affairs correspondent Rob Osborne reports from one city school that's more multi-cultural than most.
A major analysis of the migrant population of Wales has been released today by Oxford University.
The figures show Wales' foreign-born population increased by 82% in the last ten years - proportionally more than the increases in England (61%) and Northern Ireland (72%), but less than Scotland (93%).
Merthyr Tydfil saw the second biggest percentage increase of any area in Great Britain at 227% between 2001 and 2011.
Wrexham, Swansea and Newport all saw their migrant populations double, while Cardiff saw an increase of 99% to 45,967 - Wales' largest single migrant population.
Dr Carlos Varga-Silva, the Senior Researcher leading the project said,
'The biggest change has been the increase in the Polish-born population, which increased more than twenty-fold, becoming the biggest migrant group in Wales.
But it is worth noting that Wales has the smallest proportion of migrants in its population of all of the nations in the UK.'