The Crown season four: Diana, Thatcher and what else to watch out for 

The Netflix series moves into the 1980s and '90s with a cast of  powerful characters who helped define the era in Britain, and also had a big influence on Ireland 

Emma Corrin as Diana in season four of  The Crown.

Key moments in history including Britain’s first female prime minister, our introduction to Lady Diana Spencer and the killing of Louis Mountbatten are covered in series four of The Crown.

It has been months since we were first teased with gripping trailers showing Emma Corrin, 24, as Diana in her wedding dress, and Gillian Anderson, 52, portraying former PM Margaret Thatcher.