Nigel Farage said his "dream has become a reality" after Ukip topped the European parliament polls in England and Wales leaving the party with 23 MEPs.
He claimed Ukip was now the third party in British politics after the Liberal Democrats lost all but one of their MEPs in the election.
He added: "I think it is a political earthquake because I think the implications for Nick Clegg are very serious indeed, the implications for Ed Miliband are serious indeed and for David Cameron perhaps not quite as bad but that debate within his party is going to continue."
Today EU leaders voted to back Jean-Claude Juncker as new president of the very powerful EU commission, which looks like business as usual.
In Essex the potential damage Ukip could do to Miliband's Downing Street elections is clear. He is there listening to voter's concerns.
The EU parliament is about to welcome the most Eurosceptic and right-wing intake in its history.