Guest Stars Charles Edwards as Martin Charteris David Rintoul as Michael Adeane Sam Phillips as Equerry Lorraine Ashbourne as Barbara Castle Mark Dexter as Tony Benn Sinéad Matthews as Marcia Williams Aden Gillett as Richard Crossman Matthew Steer as Wilson's Aide David Charles as George Thomas Richard Harrington as Fred Phillips Gwyneth Keyworth as Gwen Edwards Simon Armstrong as Councillor Jack Parry-Jones as Teacher Grahame Fox as Worker 1 Catrin-Mai Huw as Local Woman 2 Ana Morgan as Helen Edwards Dyfrig Morris as Thomas Edwards Charlotte Gray as Beryl Moss Alison Jones as Mary Phillips Bea Stevens-Johnson as Sarah Edwards Charlie Baron as Rhys Edwards Mark Lewis as Local Man 1 Peredur Hed Llywelyn as Geraint Moss Hugh Thomas as Bishop of Llandaff Michelle McTernan as Local Woman 3 Steven Elliot as Geoffrey Morgan Rebecca Harries as Local Woman 1 Jason May as Worker 2 Nicholas McGaughey as Supervisor Dafydd Hywel as Shopkeeper David Rees Talbot as Alun Jenkins Ifan Huw Dafydd as Howell Rhys Parry Jones as Local Man 2 Lynn Hunter as Colliery Secretary Anthony O'Donnell as Mayor of Merthyr Tyfdil Simon Nehan as Worker 3