The bitter row over immigration in Europe has flared up again with a top EU official accusing UK politicians of "destroying the future of your people" by playing on fears of scarce jobs and resources. Meanwhile plans emerged of a new pan-European alliance among anti-immigration far-right parties.

Freedom of movement of the labor force is one of the founding principles of the EU. However, the expansion of the trading bloc to include ex-Communist countries like Poland and Romania has led to concerns in the U.K. that too many migrants are entering the country, claiming benefits from the U.K.'s social system and undercutting British workers.