24= (19=) Sir Euan Anstruther-Gough-Calthorpe & family £200m (£200m)

Sir Euan Anstruther-Gough-Calthorpe, who, with his family owns and runs the 1,500-acre Calthorpe Estate in Edgbaston, is undoubtedly well-connected.

And for a time it looked as if he was about to become even more well-connected. His cousin Lady Isabella Anstruther-Gough-Calthorpe was favourite to marry Prince William. However, the Prince’s rekindling of his relationship with Kate Middleton has lengthened the odds somewhat.

Not that issues like that are likely to distract the 41-year-old Sir Euan from running the Calthorpe Estate efficiently and profitably. The estate has been overseen by the family - one of the oldest in Birmingham - for nearly 300 years with the aim of making the area one of the best places to live and work

Throughout that time the family refused to allow factories or warehouses to be built within the estate, so creating a high quality urban village, and leading to the area’s high property values. It wasn’t until the late 19th century that Edgbaston - then its own town - came under Birmingham administration.

Sustainability has been at the company’s heart for three centuries and Calthorpe estates continually invests in land to preserve and enhance the environment for the benefit of current and future generations.

Calthorpe Estates is currently investing £350 million to give Edgbaston its biggest transformation to date.

Last year was a flagship year, with a number of major milestones achieved. They have set the benchmark for sustainable office development in the Midlands, picked up numerous industry awards and have seen significant on-site progress on three of their four landmark schemes.

The Anstruther-Gough-Calthorpes live in Hampshire.