How did he make his millions? At 28, Westminster inherited a near-bankrupt family business with the prime sites mortgaged, and transformed it into a professional, well-managed property group. He developed Grosvenor's international portfolio, mainly in North America and Australia, while specialising in UK urban developments. Projects include the recent £850 million Paradise Street in Liverpool, Europe's biggest retail development.
Westminster owns a further 156,000 acres around Britain, and his art collection is worth an estimated £200 million.
The secret of his success? An astute businessman, he avoids having to answer to the City by keeping Grosvenor Group private.