The party, which suffered in the 2015 election when it was left with just eight MPs, has also said it will raise all income tax by 1p to raise £6bn for the NHS and social care services and promised its flagship policy of delivering a second European Union referendum following the conclusion of Brexit negotiations.
Ms Swinson, who was the Liberal Democrat business minister in the coalition government before losing her seat two years ago, said hers was the only party campaigning to stay in both the United Kingdom and European Union single markets. And if you don't like the deal you should be able to reject it and choose to remain in Europe.
"Not Theresa May's cold, mean-spirited Britain".
It comes after Mr Farron became embroiled in controversy over his views over whether gay sex was a sin.
The Lib Dems would assemble a constitutional convention to "deliver home rule to each of the nations of a strong, federal United Kingdom".
But five years later voters abandoned the party as it bore the brunt of public anger over unpopular austerity measures and the Lib Dems lost all but eight of the 57 seats they held in the 650-seat parliament.
He adds that the Lib Dems only offer 15 hours of free childcare to all two-year-olds - half of Labour's promised 30 hours.
"The SNP want to break up the United Kingdom single market that is worth four times as much".
Len McCluskey wrong to say Labour can not win election - Kezia Dugdale
Mr McCluskey's prediction of 200 seats for Labour suggests a Tory majority of around 80. In a candid interview, Mr McCluskey said: "The scale of the task is vast ".
It pledged to continue its programme of strategic national investments, including High Speed 2, Northern Powerhouse Rail, the expansion of Heathrow Airport.
Lib Dems would remove the two-child cap on tax credits and abolish the "rape clause", end the "bedroom tax" and cancel the freeze on benefits.
"From increasing taxes to borrowing more - from putting our security at risk to scrapping Trident - these policies are an echo of Corbyn's manifesto we saw earlier this week".
The manifesto states: "While much remains uncertain about Theresa May's approach, it is now clear that the Conservatives are campaigning for a hard Brexit".
In the face of opinion polls suggesting the Lib Dems are failing to make a breakthrough, Mr Farron urged Britons to follow the lead of French voters who rejected the "two exhausted old parties" to elect President Emmanuel Macron.
But the SNP argued that the Lib Dems "can't be trusted to stand against Tory cuts", pointing to their "record of betrayal" by forming a coalition government with the Conservatives between 2010 and 2015.
On the topic of taxis and private hire services, Jeremy Corbyn's party intends to change legislation and regulations in order to introduce "national standards to guarantee safety and accessibility" as well as creating "a level playing field between operators".
But speaking in east London, he said the more Lib Dem MPs are elected, the better chance Britain has of a good Brexit.
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