Michael and Chris Oglesby and family
Rank 2017

Manchester-based developer Bruntwood was founded by Oglesby, 77. He was born in a terraced house in Scunthorpe where his father had a plumbing business. Oglesby set up a building company with a friend of his father. It became one of the biggest in Lincolnshire, but it went under and Oglesby lost everything except his house. His son Chris, 49, has run the business since 1999. Bruntwood made a £67.9m profit in 2015-16 when its net assets increased to nearly £449.3m. There are other interests and stakes.

Relative Values: Mike Oglesby and son