Ed Davey promises £17bn income tax cut if Lib Dems are elected

Growth created by rejoining EU single market and customs union would fund change, Davey tells the party’s conferenceUK politics live – latest updatesEd Davey has unveiled a plan for a £17bn income tax cut in a speech aimed at shoring up the party’s support among former Conservative voters, but which risked disappointing some Liberal Democrat MPs who want a bolder vision for the party.Addressing the party’s annual conference in Brighton, the Lib Dem leader said the proposal, which would eventually increase the threshold for paying income tax to £15,000 and raise the level at which people pay the 40p higher