Patrick Flannery and family
Initially located opposite the Oval cricket ground in south London, P Flannery Plant Hire (Oval) has more than 2,000 excavators, dumpers and other vehicles for rent. Now Wembley-based, the operation is owned by Irishman Flannery, 67, and his family. The business is worth £100m on the back of £12.5m profit from £61.5m sales in 2015-16 and assets of £36.2m. Dividends and other wealth add £11m.