Kate and Annie Madden, 17 and 16, produce supplements to prevent stomach ulcers in horses. It is used by five royal families.
Akshay Ruparelia, 19, has an online estate agency valued at £12m. Henry Patterson is 15 and his children’s books and merchandise sell in 60 countries.
To hear more about how they got to where they are, listen to this podcast from The Bottom Line.
Produced by Phoebe Keane

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