That UCL Report.

UKIP has responded to a report by University College London by expressing outrage that migrants from outside the EU have received over £100 billion more in taxpayers money than they have paid in.
The party is sceptical about other parts of the report. The report includes the period of 1995 - 2011, and claims that during this period European migrants paid 4% more in than they took out. However this snapshot includes a 9 year period when Britain didn't have open borders with Eastern European countries.

Read more... http://www.ukip.org/newsroom/news/989-only-a-controlled-migration-policy-can-ensure-prosperity