Bertie Carvel as Nick Clegg

Ian Grieve as Gordon Brown

Mark Gatiss as Peter Mandelson

Donald Sumpter as Paddy Ashdown

Andrew Bone as Andy Coulson

Chris Larkin as Danny Alexander

Nicholas Burns as Ed Balls

Marta Barrio as Miriam Clegg

Deborah Findlay as Harriet Harman

Mark Dexter as David Cameron

David Annen as Gus O'Donnell

Alex Avery as William Hague

Michael Cochrane as Senior Tory MP Buchanan

Terry Diab as Sue Nye

Nick Holder as Patrick McLoughlin

Sebastian Armesto as George Osborne

Mike Sengelow as Floor Manager

Syreeta Kumar as Gallery Director

Richard Teverson as David Laws

Duncan Wisbey as Stewart Wood

Sally Scott as Samantha Cameron

Adam James as Jeremy Heywood

Ben Abell as Lib Dem Aide

Michael Sheldon as Lib Dem Aide