The Lib Dems are appealing directly to Remain voters in the European elections and Ms Swinson, the frontrunner to replace Sir Vince Cable as party leader, told the Press Association: "Labour are refusing to take the chances to stop Brexit".
The latest travel by Olly Robbins comes amid the ongoing cross-party talks between the British ruling and opposition parties to break a current impasse.
But Mr Starmer suggested a deal was beyond reach, warning that "probably 120 if not 150" of the party's 229 MPs could vote against it unless it was linked to a second referendum.
The BBC reported that Olly Robbins would meet European Union officials to secure the change - demanded by the Labour opposition during cross-party talks aimed at breaking the Brexit impasse.
Addressing a party rally in west Yorkshire, Farage said that up until the European elections, where his party leads in the polls, he would talk only about Brexit-related matters.
"When asked about his priorities on the BBC's The Andrew Marr Show, Farage said: "... particularly 5.4 million people out there acting as sole traders running small businesses and there's nobody in government on their side.
Palestinian killed, 30 injured in clashes with Israeli soldiers in E Gaza
The website includes photos of Israel's landscape and short publicity film clips about the diversity of Israeli society. The latest deaths come amid protests following the worst fighting seen in Gaza since the war in 2014.
The Reigate MP, 58, also said that Theresa May has to step down as party leader before the conference in the autumn.
The signatories were said to include Gavin Williamson, who she sacked as defence secretary, Boris Johnson and Dominic Raab, who claim she risks losing the "loyal middle" of the Tory Party if she gives ground to Labour's demands about entering into a customs union-based deal. They have literally denied our existence from day one, and when we get on to a major interview they don't want to talk about this campaign, they don't want to talk about our candidates, they don't want to challenge Brexit and the way in which we want to do it.
"The pressure on Prime Minister May to resign mounts, but attempts to remove her from her function have failed so far".
The Conservatives were fifth with just ten per cent.
"But the reality is that as long as a majority in the House of Commons is saying to the European Union we will not leave without your permission and we will not leave without a deal then the European Union has had no incentive".
It is also implicit that the rebel group, made up of leadership contenders, would try tear up any soft Brexit agreement with Labour once Mrs May resigns.