Leonora Mary Grosvenor's father was the richest man in Britain in what decade?
Leonora Anson, Countess of Lichfield: Leonora, Countess of Lichfield, LVO (born 1 February 1949) was born as Leonora Mary Grosvenor, a daughter of the 5th Duke of Westminster. Robert Grosvenor, 5th Duke of Westminster:  In the 1970s he was the richest man in Britain.
1970s