Ed Davey told the Liberal Democrat party conference that he would "cut through the government's doom and gloom" and plans to "vanquish what's left of the Conservative Party".    With attention-grabbing stunts, which this week extended to arriving at the conference on a jet ski, and a record-breaking 72 seats in parliament making them the third biggest party, can the Lib Dems keep the momentum going?   Niall Paterson sits down on Brighton's pebble beach with our political correspondent Rob Powell, to debrief on the gimmicks, the conference, and Ed Davey's speech.   Plus, Niall catches Lib Dem MPs Tim Farron, Layla Moran, and Calum Miller to get their reaction to Davey's speech and their party's ambitions.   Producer: Soila Apparicio Editor: Philly Beaumont