Britain's anti-EU party demands clean Brexit Britain’s anti-European Union UK Independence Party (UKIP) launched a set of populist policies on Friday hoping to revive their dwindling political influence and capitalize on outrage over the government’s handling of Brexit. Prime Minister Theresa May is struggling to sell her plan for a Brexit that would continue to see Britain abide by many EU rules. Growing unrest among pro-Brexit groups could scupper her leadership and thrust Britain into political crisis. proposing.