29 Scan Computers
Revenue: £131m (+16%)
Net profit margin: 2.2% Staff: 228
This custom PC builder and components specialist attributed robust top and bottom-line growth in its year to 30 June 2018 to demand for crypto-currencies, as well as the growth of several high-profile business accounts. Founded in 1987, Bolton-based Scan targets both consumers and businesses through its website and call centre. This August it launched a new scheme pledging to replace faulty hardware within 48 hours.