A multi-millionaire Conservative party donor has given £100,000 to UKIP, after becoming disillusioned with David Cameron's policies on Europe.

Spread-betting tycoon Stuart Wheeler said he was giving the money to UKIP in protest at the Tories' reluctance to talk about the EU.

Mr Wheeler, an outspoken Euro-sceptic, gave £5m to the Conservatives in 2001.

He said he would vote UKIP in European elections in June, but intended to remain a member of the Tory party.

"The European Union is doing so much damage to our economy and our way of life that I can no longer vote Conservative at the European elections," Mr Wheeler told the News of the World newspaper.