7. Ben and Sean Saxby — £16 million
Name: Ben and Sean Saxby.
Age: Ben, 29, Sean, 26
Net worth: £16 million
Company: MJS Construction
Industry: Construction
The Saxby brothers have a combined fortune of £16 million. They run and own nearly a third of MJS Construction, a Cambridgeshire construction firm which specialises in groundwork and reinforced concrete.
7. Akshay Ruparelia — £16 million
Name: Akshay Ruparelia
Age: 19
Net worth: £16 million
Company: Doorsteps
Industry: Property
Ruparelia is the youngest person on the list. He set up Harrow-based online estate agent Doorsteps 18 months ago, selling properties for as little as £99, using a £7,000 loan from members of his family. The operation now employs more than 25 people and has about 2,000 properties on its books. Ruparelia owns 97% of the business, making him worth £16 million.
6. Nick D’Aloisio— £20 million
Name: Nick D'Aloisio.
Age: 22
Net worth: £20 million
Company: Summly
Industry: Internet
D'Aloisio sold his news app Summly to Yahoo for $30 million when he was just 17 years old. He is currently reading philosophy and computer studies at the University of Oxford and was an investor in DeepMind. He is also fundraising for a new project called Sphere Knowledge, which helps users find and chat to experts on a wide range of topics.
5. Carl Hartley — £23 million
Name: Carl Hartley
Age: 30
Net worth: £23 million
Company: Tom Hartley
Industry: Car sales
Hartley runs one of the country’s best-known supercar dealerships, which was set up by his father Tom in 1980.
4. Amy Mason and Tom Makin — £25 million
Name: Amy Mason and Tom Makin
Age: Amy, 29, and Tom, 28
Net worth: £25 million
Company: Footasylum
Industry: Retail
Siblings Mason and Tom Makin each have a 7.47% stake in shoe retailer Footasylum, which was cofounded by their father David Makin. With more than 65 stores, Footasylum has a market capitalisation of £165 million.
3. Joshua Stevens — £30 million
Name: Joshua Stevens
Age: 29
Net worth: £30 million
Company: One Retail Group
Industry: Retail
One Retail Group owns six consumer brands including Pro Breeze household appliances and outdoor equipment label Active Era. Profits doubled to £3.3 million last year on sales of nearly £14 million. Stevens fully owns the Hampstead-based business.
2. Jack Cator — £45 million
Name: Jack Cator
Age: 29
Net worth: £45 million
Company: HideMyAss!
Industry: Software
Cator created virtual private-network HideMyAss! to bypass school online filters when he was just 16. Ten years later, in 2015, he sold the company for £40 million.
1. Alex Loven — £55 million
Name: Alex Loven
Age: 30
Net worth: £55 million
Company: Net World Sports
Industry: Retail
Loven set up Net World Sports in 2009 after buying a cricket bat on eBay, then writing to the supplier to find out what the wholesale price was. His business made profits of £5 million on nearly £20 million of sales in 2016-17. Loven owns 99% of the company, which sells over 100,000 football goals a year.