Philip Jackson (Bernard Ingram) and Michael Cochrane (Alan Clark) both appeared in an earlier BBC political drama entitled Margaret Thatcher: The Long Walk to Finchley (2008), to which this production is an indirect sequel. They played Alf Roberts, the father of the title character, and Sir Waldron Smithers respectively.
Nicholas Rowe (Malcolm Rifkind), Alan Cox (Gordon Reece) and Roger Ashton-Griffiths (John Sergeant) all previously appeared in Young Sherlock Holmes (1985), in which they played Sherlock Holmes, John Watson and Sergeant Lestrade respectively.
The real No. 10 Downing Street was decorated by Steve Hunt, his first job after leaving school. The entrance hall behind the famous No. 10 front door is blue in the film, but was really painted red, which Margaret Thatcher did not like, since it is the traditional colour for the opposition Labour Party. The main staircase was painted in a stippled yellow glaze, not beige-pink like in the film.
Nicholas Rowe, playing a Tory MP, is the son of an actual Tory MP.
Stars three different actors who have played 18th Century novelist Henry Fielding; Ian McDiarmid in City of Vice (2008), John Sessions in The History of Tom Jones, a Foundling (1997) and Nicholas Rowe in A Harlot's Progress (2006).