Clinton, Spencer and John McCarthy
John McCarthy, 77, founded McCarthy & Stone in 1976. Specialising in retirement homes, it was delisted from the London stock exchange in 2006 after a successful takeover bid of £1.1bn. John's sons, 52-year-old Clinton, and Spencer 51, own Hampshire-based Churchill Retirement Living, which made a record £57.3m profit in 2015-16, when assets grew by more than 50% to £97.9m. The business has developments in Surrey, Hertfordshire and the West Midlands. We add £55m for dividends and other interests.