It would be "foolish" if Britain's main parties did not worry about Ukip topping a national election in Britain, Tony Blair has said.
Mr Blair made no mention of Labour's performance or the response of Ed Miliband to the results in remarks to Swedish television reported by his office.
The former Prime Minister said there was a "major issue" about the way Europe worked and said pro-Europeans had to take on board the message sent by voters.
He added: "At the same time we have got to be strong enough to show the leadership, to take on this wave of anti-immigration and old-fashioned ultra-nationalist feeling which isn't the future, has nothing to offer people and is no real response to the challenges of the 21st century.
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.