Liberal Democrat leader Nick Clegg told delegates at his Party's conference today that he loved Britain and wanted it to stay in the European Union.
In his keynote speech, the Deputy Prime Minister also attacked Ukip, calling them the "acceptable face" of backward-facing politics.
ITV News political correspondent Romilly Weeks was at the conference in York:
Nick Clegg intends to remain as Liberal Democrat leader until at least 2020 - whether or not the party is in power - his office said today as speculation about the Deputy Prime Minister's future overshadowed his spring conference speech.
The Deputy Prime Minister was forced to respond to speculation about his future following reports that senior MPs were positioning themselves as possible successors.
"Nick Clegg intends to be the leader of the Liberal Democrats today, tomorrow, into the 2015 election and through the whole of the next parliament," a spokesman said.
"He intends to be leader of the Liberal Democrats whether or not we are in government."
A Liberal Democrat MP wore a Nigel Farage mask at the party's conference as she mocked the Ukip leader's penchant for beer.
Just before Nick Clegg's appearance, Lorely Burt also mocked a former-Ukip councillor's claim that this winter's floods had been brought on by the introduction of gay marriage.
The Liberal Democrats are the only guardians of a "modern, open and tolerant Britain", leader Nick Clegg has said to the party's spring conference.
Mr Clegg defended his party's role in the coalition government, and said the party must remain in power after next year's general election to ensure the "reconstruction and renewal" of the country.
The deputy prime minister added that, though many "still feel the squeeze" of the recent economic downturn, British people can "finally see the light at the end of the tunnel".
Nick Clegg has aimed fire at Nigel Farage and Ukip for their "politics of blame" in his closing speech at the Liberal Democrats' spring conference in York.
As some polls indicate eurosceptic Ukip may overtake the Lib Dems in May's European elections, Clegg said: "Do you want Britain in or out [of the EU]? That's the real question in May."
Nick Clegg will start the build up to his European election debate showdown with Ukip leader Nigel Farage by promising to take on "backwards-looking politics and making the case for EU membership.
Speaking at the Liberal Democrat party conference in York later today, the Deputy Prime Minister will acknowledge the EU needs reform, but in a swipe at his Tory coalition colleagues will stress that the UK cannot demand changes with "one foot out of the door".
He will warn that "pulling up the drawbridge" would wreck the economy, make it harder to catch international criminals and hamper efforts to tackle climate change.
The Liberal Democrats will make raising the personal income tax allowance to £12,500 a key demand in any coalition negotiations after the 2015 general election.
Treasury Chief Secretary Danny Alexander confirmed in a speech to the party's spring conference that increasing the threshold will be written into the party's manifesto for the contest.
A rise of at least £500 - giving a tax cut of £100 - would be earmarked for the first Budget after the election, he said.
The Lib Dems have made raising the point at which people start paying income tax to £10,000 a priority in Government and Mr Alexander indicated pressure was mounting for George Osborne to signal a further rise to £10,500 in this month's Budget.
Raising the personal income tax allowance to £12,500 will be a key Liberal Democrat demand in any coalition talks after the 2015 election, the senior minister who will lead the party's negotiating team will say today.
Treasury Chief Secretary Danny Alexander will confirm that increasing the threshold will be written into the party's manifesto for the contest, and a rise of at least £500 - giving a tax cut of £100 - would be earmarked for the first Budget or Autumn Statement after the election.
The Lib Dems have made raising the point at which people start paying income tax to £10,000 a priority in Government, and Mr Alexander indicated pressure was mounting for George Osborne to signal a further rise to £10,500 in this month's Budget.