Labour's deputy leader has hit out at Nick Clegg after his conference speech, accusing him of being "desperate" to justify working with the Tories.
Harriet Harman attacked the Deputy Prime Minister over his suggestion that the Lib Dems should be judged by their achievements in government.
"Nick Clegg was right about one thing in his speech - the Lib Dems should be judged on their record. It is a record of broken promises and weakness.
She said Mr Clegg was "trying desperately to justify the decision he and his party took to back the Tories all the way".
Addressing party activists in Glasgow, Liberal Democrat leader Nick Clegg said:
Someone has to stand up for the liberal Britain in which we and millions of decent, reasonable people believe.
For tolerance, compassion, openness, unity - the values this party holds so dear.
If the Liberal Democrat voice is marginalised in British politics, our country will be meaner, poorer and weaker as a result.
We must not and cannot let that happen. We must make our voice heard.
Nick Clegg has urged voters to give the Liberal Democrats another chance, after admitting his party have been tainted by government.
The Deputy Prime Minister acknowledged that he was "no longer the "untainted... fresh-faced outsider", vowing to learn from the "mistake" of his infamous U-turn on university tuition fees.
"How will you judge us? By the one policy we couldn't deliver or by the countless policies we did deliver in Government," he said at the party's conference in Glasgow.
Mr Clegg claimed his was the only party who stood up for "decent British values" against "un-British" politics.
Nick Clegg has accused Home Secretary Theresa May of "playing party politics with national security".
"Stop playing on people's fears simply to try and get your own way," Mr Clegg said in his conference speech.
"Your Communications Data Bill was disproportionate, disempowering. We blocked it once and we'll do it again," he told Mrs May.
Comedian Al Murray has distanced himself from Nick Clegg's praise for his comments during the Scottish referendum campaign.
Clegg said the "Pub Landlord" had struck a chord by noting there was something "wonderfully vague about being British" in the lead-up to last month's poll.
But Murray quickly took to Twitter to say: "This Clegg business is nothing to do with me."
ATTENTION WORLD'S MEDIA: This Clegg business is nothing to do with me.
He went on to offer the Deputy Prime Minister some policy suggestions.
DEAR NICK CLEGG: The Pub Landlord also doesn't want to pay his speeding fines.
DEAR NICK CLEGG: The Pub Landlord vows in his next government to raise the temperature 5 degrees by 2019 to "save Blackpool's tourist trade"
The Liberal Democrats will "borrow less than Labour but cut less than the Tories" to cut the deficit, Nick Clegg said.
"We will finish the job, but we'll finish it in a way that is fair," the party leader said.
ITV News Political Editor Tom Bradby tweeted:
Nick Clegg is dismissive of Labour, but vigorously - even venomously - critical of the Tories. Must have been enjoying coalition!
Nick Clegg has said "something very un-British is taking root" in British politics, accusing Nigel Farage and Alex Salmond of wanting to "pull us apart".
Mr Clegg warned of the dangers of "bitter nationalism", adding: "A growing movement of people who want to pull us apart.
"Salmond, Farage, the bitter tribalism of left and right - in their different ways they're all doing the same thing.
"A growing pick-a-side politics, in a world of us-versus-them."
Nick Clegg has "thanked" Ed Miliband and George Osborne for their conference speeches, saying they showed the Liberal Democrats are the "only party in British politics that stands for a stronger economy and fairer society".
Nick Clegg has paid tribute to David Haines and Alan Henning who were murdered by Islamic State militants.
Mr Clegg said both men stood for "hope and compassion", and vowed to defeat the "barbarity" of the "cowards" who took their lives.
"Britain will not be intimidated," the Deputy Prime Minister said.