The first thing to note is this is not a 'true biopic' of Lady Thatcher. Rather it sits around her post Prime Ministerial and Commons career. Dealing frankly with old age and dementia.
Her rise and subsequent role as Prime Minister is shown as a series of flashbacks. While these are the meat of the film they are hung around her hallucinated interactions with her deceased husband.

Meryl Streep is as always wonderful, ably supported by Jim Broadbent. I felt that the rest of the supporting cast of the cabinet and various members of the house similarly added a level of depth often overlooked in films which focus on such a strong character as Margaret Thatcher.

While Lady Thatcher did and undoubtedly still does polarise opinion. There is no doubt she is one of the few Members of Parliament to make a real and lasting mark upon the country and the political world as a whole. The film also does rather gloss over and never show any of the many (although still a small percentage) of female members of the house at her time as a Member of Parliament.