Why does Britain have so many new parties? And why are none of them the fun kind? Catherine Bohart investigates the rising challengers to the two-party system, with the help of Zoe Lyons, Ian Dunt and roving correspondent Sunil Patel.

Written by Catherine Bohart, with Madeleine Brettingham, Gareth Gwynn and John Tothill.

Producer: Alison Vernon Smith Executive Producers: Lyndsay Fenner & Victoria Lloyd Sound Design: David Thomas Production Co-ordinator: Katie Sayer

A Mighty Bunny production for BBC Radio 4