Nick Clegg is hoping that there are votes to pick up in being the clearest voice on the pro-Europe side of the debate.
The manager of the hotel that inspired the TV show Fawlty Towers has praised the work of his immigrant staff - unlike the hapless Manuel.
Labour won the Wythenshawe and Sale East parliamentary by-election today while the Conservatives were pushed into third place by Ukip.
Ukip leader Nigel Farage has eaten fruitcake from a stall at his spring conference which made reference to David Cameron's comments about his party's members.
"They can abuse us as much as they want and the more they throw all these words at us, the more people vote for us," he said, before declaring the fruitcake "delicious".
Ukip has claimed it is "reclaiming" the slogan "Love Britain Vote Ukip" after it emerged the BNP had used a similar line.
The slogan was draped on large banners on either side of the main conference stage in Torquay, where Ukip is holding its spring gathering today. It is also on the cover of a conference brochure.
In the past, the BNP used the slogan "Love Britain Vote BNP", together with an image of Marmite.
The comparison was highlighted on the Guido Fawkes Order Order blog as party members gathered at the conference.
A Ukip spokeswoman said Ukip was "reclaiming" the line by using it.
A stall at the Ukip spring conference in Torquay makes reference to David Cameron's comments that the party's members were "closet racists, loonies and fruitcakes."
Nigel Farage refused to confirm or deny if Ukip would prefer a coalition deal with Labour or the Conservatives, but told Daybreak he would "do a deal with the devil" if it meant the UK could "win back its independence" in a referendum.
Nigel Farage has claimed Ukip now represents a broad base of public opinion in the UK, despite opponents' attempts to seize on "eccentric" comments by his party's candidates.
Ukip has faced controversy in the past when MEP Godfrey Bloom struck a journalist over the head with a brochure, a councillor blamed flooding on same-sex marriage and a candidate was filmed saying she wanted to send all immigrants home.
"Any eccentric comment made by any Ukip immediately becomes a huge national scandal, well, they can say what they like; we represent a broadly based body of public opinion in this country that recognises the extent to which our political class have betrayed us," Farage is expected to say today.
The Ukip leader is expected to place immigration at the centre of Ukip's European election campaign when his party's spring conference gets underway in Torquay today.
Nigel Farage is expected to place immigration at the centre of Ukip's European election campaign as the party's spring conference gets underway in Torquay.
Ukip is bidding to become the biggest British party in the Strasbourg parliament, and Nigel Farage has said it would represent a "political earthquake" if the party manages to win elections to the European parliament on May 22.
Mr Farage will tell the conference that the party now poses the biggest threat to the "political establishment" seen in modern times, claiming it now represents a wide swathe of mainstream opinion in Britain.
Farage will focus on immigration and claim that politicians will be unable to control the numbers coming into the country as long as it remains a member of the EU.
"Immigration has now become the number one issue in British politics, we cannot have our own immigration policy and remain a member of the European Union," he will say.
UKIP leader Nigel Farage has accepted a challenge from Deputy Prime Minister Nick Clegg to a public debate over Britain's membership of the European Union.
Mr Farage told the LBC radio station that he wants other party leaders involved in the debate also.
Accepted Nick Clegg's offer of a debate, hope the others join in too. Ed's been particularly quiet...
Making the call during his weekly radio show on Thursday, Mr Clegg said he was "very happy and very keen" directly to pit the Liberal Democrats' support of UK membership of the EU against Ukip's desire to withdraw.
17 by elections since 2010. 13 of them in England. In just under half of those @ukip have now finished in 2nd place. Protest? Or trend?
Labour's triumph in the Wythenshaw and Sale East by-election was "disastrous" for the Conservatives and Liberal Democrats, and vindicates Ed Miliband's new approach, said Ivan Lewis, shadow minister for Northern Ireland.
"This was a disastrous night for the two coalition partners," Mr Lewis told ITV's Daybreak. "The big news last night was the Lib Dems losing their deposit, the Tories being shunted into third place."
"It was a vindication of Ed Miliband's focus on the cost of living crisis which is affecting the vast majority of people in this country."
But Mr Lewis conceded that the low turnout of 28 per cent was cause for concern for all parties, saying: "all of us have to face up to the fact that people do feel alienated from mainstream politicians."
Prime Minister David Cameron said that Labour's win at the Wythenshawe and East Sale by-election was not "particularly surprising", but conceded that voters were sending a signal to the Conservative party, which came third in the vote, behind UKIP.
"Obviously one would prefer to come second rather than third, but I dont think this is a particularly surprsing result in Labour holding this seat," Mr Cameron told ITV's Daybreak.
"I don't think it was the sort of break through that people were talking about," he added.
"When people know that there's a by-election, they know the government isn't going to change, but obviously messages are sent, and signals are sent and protests are made, and governments should always listen to those things and I always do."