Fears an influx of Romanians and Bulgarians to Britain will put a strain on public services have been downplayed in an independent report, published by the Foreign Office.
But the number that may arrive on UK shores after immigration restrictions are lifted next year remains unpredictable, according to the National Institute of Economic and Social Research (NIESR) study.
Schools were likely to take much of the strain but the effect on the NHS, the housing sector and the welfare system will be less pronounced, it said.
Bulgaria and Romania joined the European Union in 2007 but under "transitional arrangements" workers from the two countries were prevented from travelling to the UK.
More top news
They met the stars of the new Star Wars movie at the Royal Albert Hall in London, arriving on the red carpet to be greeted by robot BB-8.
The station, which saw 44m people commuters use it in 2016/2017, will be transformed into a dining room complete with Christmas decorations.
Part of the monster fatberg will go on display in the Museum of London, while the rest of it will be converted into biodiesel.