That brings our live text commentary of Tuesday's conference proceedings to a close. Highlights can be found by clicking on the Key Video tab above. You can watch all of today's speeches in full on BBC Parliament and follow the latest twists and turns at Today at Conference at 23.25 BST on BBC Two. We'll be back tomorrow for the final day of Lib Dem conference, which culminates in a speech by Nick Clegg. Do join us.

Former Lib Dem leader Lord Ashdown is asked about this afternoon's vote to reject attempts backed by the party hierarchy to change its stance on airport expansion. "We are a democratic party and the leadership doesn't always get its way," he tells BBC News.

With a show of hands party members vote to adopt the policy motion on the Middle East - and attention turns to a motion censuring the party's Federal Executive for "unconstitutional behaviour".

@JoshDixonTweets:, external Great speech by @SarahBrown1984 who was flying the flag for the carers in our society #LDconf

Nick Clegg, who makes his conference speech tomorrow, has said the Liberal Democrats would cut the taxes of 29 million working people in 2016 if they remain in government. The deputy prime minister told the BBC's political editor Nick Robinson no-one would pay tax on the first £11,000 of income from April 2016, a £1,000 rise on current limits.

Menzies Campbell stresses that Turkey should be persuaded to "give up its stand off" and supply the Kurds with weapons to assist their fight against IS, warning that if the Syria-Turkey border town of Kobane - where fighting is raging - falls to IS, "there will be slaughter on an apocalyptic scale". He doubts that there can "ever be a more compelling case for humanitarian intervention".

Former Lib Dem leader Sir Menzies Campbell voices his support for UK involvement in air strikes against Islamic State militants in Syria. He says David Cameron should seek Parliament's approval to join US-led operations, to combat the "massive ethnic and religious cleansing".

This is the first of two "emergency motions" on topical matters being discussed by Lib Dem activists. The second is concerned with the party's Federal Executive.

@smee_anne tweets:, external @BBCPolitics #ldconf Tim Farron looking forward too, by stating urgent investment in infrastructure was the way to stabilise economy

Terry Wise in Chelmsford: After supporting Lib Dems most of my voting life, no more, they are no longer a viable ruling party, they have proved themselves to be a total non-entity, soon to be consigned to the parliamentary dustbin, a let down, disappointing to say the least.

Martin Horwood MP expresses the party's sadness at the death of British aid worker Alan Henning, who was killed by Islamic State (IS) militants. "He was one of the best of men, murdered by the worst," he says. The motion on the Middle East calls on the government to continue to work closely with international allies to stop the spread of IS "in Iraq, Syria and beyond".

Matthew Bambridge in London: This just shows that the Lib Dems have not grown as a party and are still unable to make sensible policy decisions. Britain needs an increase in runways to remain competitive in Europe.

The Liberal Democrats have moved on to the final item on the agenda, which begins with a discussion on the latest situation in the Middle East. Opening, Cheltenham MP Martin Horwood criticises what he says are "illegal" Israeli settlements in the West Bank and the country's "disproportionate" response to rocket attacks from Gaza. Mr Horwood explains that the motion before conference encourages a "united European stance that recognises Palestinian statehood".

tweets:, external Prime Minister tells me he's written to @GeoffreyBoycott to explain choosing @williamhague01 as greatest living #Yorkshireman-@BBCLookNorth

tweets:, external Nick Clegg not planning to make any outfit changes during his big speech tomorrow. Aides says it's a suit and tie affair #outfitgate

Emma: My parents bought a house 32 years ago, 20 minutes away from Gatwick in a beautiful area. They spent 30-odd years doing it up. From the garden you could always see planes but noise was never a problem. Visiting this summer was terrible. You couldn't sit outside and chat as every few minutes you'd have to pause and wait for the plane to go by otherwise you couldn't hear yourself speak. If Gatwick is expanded my parents, like many others, will end up moving from the home they've lived in and worked hard to build.

blogs: Lib Dems mulling capital gains tax hike, external. David Laws has hinted that the Liberal Democrats could raise capital gains tax to meet their pledge to cut taxes for lower earners. Read more, external

It's a standing ovation for Lib Dem President Tim Farron, as he ends his speech with a call for the party to offer "wisdom amidst the hysteria". "This is our opportunity," he tells activists. "This is the Liberal moment. Let's grab it."

Tim Farron says more work is needed to achieve "real" equality, branding it a "moral outrage" that too often women are "paid less and matter less". He also notes that "our politics and our party" does not yet fully reflect society and says Lib Dems will redouble their efforts to change that.

Tim Farron says it is "ludicrous" that Britain's largest city - the capital - is more than seven times bigger than its second largest. London matters "far too much for its own good, and for the country's good," he adds.