Matt Chorley is at the Lib Dem conference in Brighton, where leader Sir Vince Cable had a nightmare delivering the key part of his speech.

Polly Mackenzie, former Lib Dem No10 policy chief, Vanessa Pine, former adviser to Sir Vince, and Henry Zeffman, Times political correspondent, pick over a bad few days beside the sea.

Matthew Parris, The Times columnist, discusses 30 years of attending Lib Dem conference.

And Matt goes in search of anyone who want to be Lib Dem leader instead.

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