
A bagel shop, a DVD envelope, a property search and a car transporter: Alex Chesterman kept finding British businesses in American ideas. Zoopla made the method look persuasive. Cazoo exposed its limits.

Before BigChange, Martin Port sold bread. After its sale, he went back to the customers whose vans, invoices and unanswered calls had kept giving him ideas.

Before co-founding Aker Systems, Darren Thomas worked inside the machinery of enterprise technology. Building his own company meant learning when to take charge, when to ask for help, and when to turn up as Yoda.

He left bond trading to deliver groceries, then sold the machinery to other supermarkets. As Ocado prepares for a leadership handover, Tim Steiner’s career turns on a question he has been answering since 2000: what, exactly, is this business?