It was made by the same production company as the 2008 television film The Long Walk to Finchley, which fictionalised the start of Thatcher's political career.
Margaret is a fictionalisation of the life of Margaret Thatcher (played by Lindsay Duncan) and her fall from the premiership in the 1990 leadership election, with flashbacks telling the story of Thatcher's defeat of Edward Heath in the 1975 leadership election.
[1] On 9 April 2008, it was announced that Duncan was to play Thatcher, and filming commenced in the summer of that year.
Allam, Cochrane, Jones and Sessions would go on to appear in the 2011 film The Iron Lady about Thatcher's rise to power, relationship with her husband, and life after politics.
The Guardian critic praised the "deft casting" and stated that the flashbacks were "illuminating and sometimes entertaining" and that some episodes in the drama were "wholly imaginary and thoroughly un-Thatcherite, but ... [hang] around the mind like cigar smoke".