The richest Brit: Gerald Cavendish Grosvenor

Net worth: $13 billion

Forbes rank: 81

Background: Gerald Cavendish Grosvenor's wealth comes from his Grosvenor Property Group. His real estate group has holdings on five continents. Cavendish is also sixth Duke of Westminster. He owns 190 acres in Belgravia next to Buckingham Palace and his family owns 96,000 acres in Scotland, 32,000 acres in Spain and thousands elsewhere in England.