Paul Nuttall, UKIP's deputy leader, says any election pact with the Conservatives would be "very difficult" while David Cameron heads up the party.
"You really can't believe a word he says on the European Union and he's also a guy who called us closet racists," he said.
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Savers into the new scheme can expect rates as high as 4 percent from some banks.
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Strong performance from world number 100 meant Great Britain very nearly dominated day one of the competition.