•Coming to a head in June is a European Court of Justice case which could cost the UK taxpayer up to a total of £50 billion.
Multinational corporations with EU subsidiaries have already been paid back £7.78 billion.
UKIP Finance spokesman Steven Woolfe MEP said: “The ECJ is making a full frontal attack on UK tax sovereignty and a lunge for the pockets of British taxpayers. It’s outrageous that an EU court can overturn a settled decision made by our parliament.
“OBR figures for 2016 show that the UK made a contribution post-rebate of £15.3 billion. These latest paybacks enforced by the ECJ on British tax authorities should be added to the UK contribution figures so voters have a true idea of how much EU membership is costing us each year.